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PUB. NO. 229 VOL. 4 SIGHT REDUCTION TABLES FOR MARINE NAVIGATION LATITUDES 45°60 °, Inclusive NATIONAL IMAGERY AND MAPPING AGENCY

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  • PUB. NO. 229VOL. 4

    SIGHT REDUCTION TABLESFOR

    MARINE NAVIGATIONLATITUDES 45°—60°, Inclusive

    NATIONAL IMAGERY AND MAPPING AGENCY

  • Page II

    INTERPOLATION TABLE

    Altitude Difference (d) DoubleSecond

    Diff.andCorr.

    Altitude Difference (d) DoubleSecond

    Diff.andCorr.

    Dec.Inc. Tens Decimals Units

    Dec.Inc. Tens Decimals Units

    10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′

    0.0 0.0 0.0 0.0 0.0 0.0 .0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 8.0 1.3 2.6 4.0 5.3 6.6 .0 0.0 0.1 0.3 0.4 0.6 0.7 0.8 1.0 1.1 1.3

    1.64.88.0

    11.214.517.720.924.127.330.533.736.9

    0.10.20.30.40.50.60.70.80.91.01.1

    0.1 0.0 0.0 0.0 0.0 0.1 .1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.10.048.2

    8.1 1.3 2.7 4.0 5.4 6.7 .1 0.0 0.2 0.3 0.4 0.6 0.7 0.9 1.0 1.1 1.30.2 0.0 0.0 0.1 0.1 0.1 .2 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 0.0 8.2 1.3 2.7 4.1 5.4 6.8 .2 0.0 0.2 0.3 0.5 0.6 0.7 0.9 1.0 1.2 1.30.3 0.0 0.1 0.1 0.2 0.2 .3 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 8.3 1.4 2.8 4.1 5.5 6.9 .3 0.0 0.2 0.3 0.5 0.6 0.8 0.9 1.0 1.2 1.30.4 0.1 0.1 0.2 0.3 0.3 .4 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 8.4 1.4 2.8 4.2 5.6 7.0 .4 0.1 0.2 0.3 0.5 0.6 0.8 0.9 1.0 1.2 1.3

    0.5 0.1 0.2 0.3 0.3 0.4 .5 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 8.5 1.4 2.8 4.3 5.7 7.1 .5 0.1 0.2 0.4 0.5 0.6 0.8 0.9 1.1 1.2 1.30.6 0.1 0.2 0.3 0.4 0.5 .6 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1

    16.248.6

    8.6 1.4 2.9 4.3 5.7 7.2 .6 0.1 0.2 0.4 0.5 0.7 0.8 0.9 1.1 1.2 1.40.7 0.1 0.3 0.4 0.5 0.6 .7 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 0.1 8.7 1.5 2.9 4.4 5.8 7.3 .7 0.1 0.2 0.4 0.5 0.7 0.8 0.9 1.1 1.2 1.40.8 0.2 0.3 0.4 0.6 0.7 .8 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 8.8 1.5 3.0 4.4 5.9 7.4 .8 0.1 0.3 0.4 0.5 0.7 0.8 1.0 1.1 1.2 1.40.9 0.2 0.3 0.5 0.6 0.8 .9 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 8.9 1.5 3.0 4.5 6.0 7.5 .9 0.1 0.3 0.4 0.6 0.7 0.8 1.0 1.1 1.3 1.4

    1.0 0.1 0.3 0.5 0.6 0.8 .0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 9.0 1.5 3.0 4.5 6.0 7.5 .0 0.0 0.2 0.3 0.5 0.6 0.8 0.9 1.1 1.3 1.41.1 0.2 0.3 0.5 0.7 0.9 .1 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 9.1 1.5 3.0 4.5 6.0 7.6 .1 0.0 0.2 0.3 0.5 0.6 0.8 1.0 1.1 1.3 1.41.2 0.2 0.4 0.6 0.8 1.0 .2 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2

    8.224.641.0

    9.2 1.5 3.0 4.6 6.1 7.6 .2 0.0 0.2 0.3 0.5 0.7 0.8 1.0 1.1 1.3 1.51.3 0.2 0.4 0.6 0.9 1.1 .3 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 9.3 1.5 3.1 4.6 6.2 7.7 .3 0.0 0.2 0.4 0.5 0.7 0.8 1.0 1.2 1.3 1.51.4 0.2 0.5 0.7 0.9 1.2 .4 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 0.1

    0.2

    9.4 1.6 3.1 4.7 6.3 7.8 .4 0.1 0.2 0.4 0.5 0.7 0.9 1.0 1.2 1.3 1.5

    1.44.27.19.9

    12.715.518.421.224.026.829.732.535.3

    1.5 0.3 0.5 0.8 1.0 1.3 .5 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 9.5 1.6 3.2 4.8 6.3 7.9 .5 0.1 0.2 0.4 0.6 0.7 0.9 1.0 1.2 1.3 1.5

    0.10.20.30.40.50.60.70.80.91.01.11.2

    1.6 0.3 0.5 0.8 1.1 1.3 .6 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 9.6 1.6 3.2 4.8 6.4 8.0 .6 0.1 0.3 0.4 0.6 0.7 0.9 1.0 1.2 1.4 1.51.7 0.3 0.6 0.9 1.2 1.4 .7 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 9.7 1.6 3.3 4.9 6.5 8.1 .7 0.1 0.3 0.4 0.6 0.7 0.9 1.1 1.2 1.4 1.51.8 0.3 0.6 0.9 1.2 1.5 .8 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 9.8 1.7 3.3 4.9 6.6 8.2 .8 0.1 0.3 0.4 0.6 0.8 0.9 1.1 1.2 1.4 1.61.9 0.4 0.7 1.0 1.3 1.6 .9 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 9.9 1.7 3.3 5.0 6.6 8.3 .9 0.1 0.3 0.5 0.6 0.8 0.9 1.1 1.3 1.4 1.6

    2.0 0.3 0.6 1.0 1.3 1.6 .0 0.0 0.0 0.1 0.1 0.2 0.2 0.2 0.3 0.3 0.4 10.0 1.6 3.3 5.0 6.6 8.3 .0 0.0 0.2 0.3 0.5 0.7 0.9 1.0 1.2 1.4 1.62.1 0.3 0.7 1.0 1.4 1.7 .1 0.0 0.0 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.4 10.1 1.7 3.3 5.0 6.7 8.4 .1 0.0 0.2 0.4 0.5 0.7 0.9 1.1 1.2 1.4 1.62.2 0.3 0.7 1.1 1.4 1.8 .2 0.0 0.0 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.4

    5.015.025.035.1

    0.10.20.3

    10.2 1.7 3.4 5.1 6.8 8.5 .2 0.0 0.2 0.4 0.6 0.7 0.9 1.1 1.3 1.4 1.62.3 0.4 0.8 1.1 1.5 1.9 .3 0.0 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.4 10.3 1.7 3.4 5.1 6.9 8.6 .3 0.1 0.2 0.4 0.6 0.8 0.9 1.1 1.3 1.5 1.62.4 0.4 0.8 1.2 1.6 2.0 .4 0.0 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.4 10.4 1.7 3.5 5.2 6.9 8.7 .4 0.1 0.2 0.4 0.6 0.8 0.9 1.1 1.3 1.5 1.6

    2.5 0.4 0.8 1.3 1.7 2.1 .5 0.0 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.4 10.5 1.8 3.5 5.3 7.0 8.8 .5 0.1 0.3 0.4 0.6 0.8 1.0 1.1 1.3 1.5 1.72.6 0.4 0.9 1.3 1.7 2.2 .6 0.0 0.1 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.4 10.6 1.8 3.5 5.3 7.1 8.8 .6 0.1 0.3 0.5 0.6 0.8 1.0 1.2 1.3 1.5 1.72.7 0.5 0.9 1.4 1.8 2.3 .7 0.0 0.1 0.1 0.2 0.2 0.2 0.3 0.3 0.4 0.4 10.7 1.8 3.6 5.4 7.2 8.9 .7 0.1 0.3 0.5 0.6 0.8 1.0 1.2 1.3 1.5 1.72.8 0.5 1.0 1.4 1.9 2.4 .8 0.0 0.1 0.1 0.2 0.2 0.2 0.3 0.3 0.4 0.4 10.8 1.8 3.6 5.4 7.2 9.0 .8 0.1 0.3 0.5 0.7 0.8 1.0 1.2 1.4 1.5 1.72.9 0.5 1.0 1.5 2.0 2.5 .9 0.0 0.1 0.1 0.2 0.2 0.2 0.3 0.3 0.4 0.4 10.9 1.9 3.7 5.5 7.3 9.1 .9 0.2 0.3 0.5 0.7 0.9 1.0 1.2 1.4 1.6 1.7

    3.0 0.5 1.0 1.5 2.0 2.5 .0 0.0 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.5 0.5 11.0 1.8 3.6 5.5 7.3 9.1 .0 0.0 0.2 0.4 0.6 0.8 1.0 1.1 1.3 1.5 1.71.33.86.38.9

    11.414.016.519.021.624.126.729.231.734.3

    0.10.20.30.40.50.60.70.80.91.01.11.21.3

    3.1 0.5 1.0 1.5 2.0 2.6 .1 0.0 0.1 0.1 0.2 0.2 0.3 0.4 0.4 0.5 0.5

    3.610.918.225.532.840.1

    0.10.20.30.40.5

    11.1 1.8 3.7 5.5 7.4 9.2 .1 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.73.2 0.5 1.0 1.6 2.1 2.6 .2 0.0 0.1 0.1 0.2 0.2 0.3 0.4 0.4 0.5 0.5 11.2 1.8 3.7 5.6 7.4 9.3 .2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.83.3 0.5 1.1 1.6 2.2 2.7 .3 0.0 0.1 0.1 0.2 0.3 0.3 0.4 0.4 0.5 0.5 11.3 1.9 3.8 5.6 7.5 9.4 .3 0.1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.83.4 0.6 1.1 1.7 2.3 2.8 .4 0.0 0.1 0.1 0.2 0.3 0.3 0.4 0.4 0.5 0.5 11.4 1.9 3.8 5.7 7.6 9.5 .4 0.1 0.3 0.5 0.7 0.8 1.0 1.2 1.4 1.6 1.8

    3.5 0.6 1.2 1.8 2.3 2.9 .5 0.0 0.1 0.1 0.2 0.3 0.3 0.4 0.4 0.5 0.6 11.5 1.9 3.8 5.8 7.7 9.6 .5 0.1 0.3 0.5 0.7 0.9 1.1 1.2 1.4 1.6 1.83.6 0.6 1.2 1.8 2.4 3.0 .6 0.0 0.1 0.2 0.2 0.3 0.3 0.4 0.4 0.5 0.6 11.6 1.9 3.9 5.8 7.7 9.7 .6 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.6 1.83.7 0.6 1.3 1.9 2.5 3.1 .7 0.0 0.1 0.2 0.2 0.3 0.3 0.4 0.4 0.5 0.6 11.7 2.0 3.9 5.9 7.8 9.8 .7 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.93.8 0.7 1.3 1.9 2.6 3.2 .8 0.0 0.1 0.2 0.2 0.3 0.3 0.4 0.5 0.5 0.6 11.8 2.0 4.0 5.9 7.9 9.9 .8 0.2 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.93.9 0.7 1.3 2.0 2.6 3.3 .9 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.5 0.5 0.6 11.9 2.0 4.0 6.0 8.0 10.0 .9 0.2 0.4 0.6 0.7 0.9 1.1 1.3 1.5 1.7 1.9

    4.0 0.6 1.3 2.0 2.6 3.3 .0 0.0 0.1 0.1 0.2 0.3 0.4 0.4 0.5 0.6 0.7 12.0 2.0 4.0 6.0 8.0 10.0 .0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.5 1.7 1.94.1 0.7 1.3 2.0 2.7 3.4 .1 0.0 0.1 0.2 0.2 0.3 0.4 0.5 0.5 0.6 0.7

    2.98.614.420.225.931.737.5

    0.10.20.30.40.50.6

    12.1 2.0 4.0 6.0 8.0 10.1 .1 0.0 0.2 0.4 0.6 0.9 1.1 1.3 1.5 1.7 1.94.2 0.7 1.4 2.1 2.8 3.5 .2 0.0 0.1 0.2 0.2 0.3 0.4 0.5 0.5 0.6 0.7 12.2 2.0 4.0 6.1 8.1 10.1 .2 0.0 0.2 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.94.3 0.7 1.4 2.1 2.9 3.6 .3 0.0 0.1 0.2 0.2 0.3 0.4 0.5 0.5 0.6 0.7 12.3 2.0 4.1 6.1 8.2 10.2 .3 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.94.4 0.7 1.5 2.2 2.9 3.7 .4 0.0 0.1 0.2 0.3 0.3 0.4 0.5 0.6 0.6 0.7 12.4 2.1 4.1 6.2 8.3 10.3 .4 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 2.0

    4.5 0.8 1.5 2.3 3.0 3.8 .5 0.0 0.1 0.2 0.3 0.3 0.4 0.5 0.6 0.6 0.7 12.5 2.1 4.2 6.3 8.3 10.4 .5 0.1 0.3 0.5 0.7 0.9 1.1 1.4 1.6 1.8 2.0 1.23.55.88.1

    10.512.815.117.419.822.124.426.729.131.433.736.0

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.5

    4.6 0.8 1.5 2.3 3.1 3.8 .6 0.0 0.1 0.2 0.3 0.3 0.4 0.5 0.6 0.6 0.7 12.6 2.1 4.2 6.3 8.4 10.5 .6 0.1 0.3 0.5 0.7 1.0 1.2 1.4 1.6 1.8 2.04.7 0.8 1.6 2.4 3.2 3.9 .7 0.1 0.1 0.2 0.3 0.4 0.4 0.5 0.6 0.7 0.7 12.7 2.1 4.3 6.4 8.5 10.6 .7 0.1 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.04.8 0.8 1.6 2.4 3.2 4.0 .8 0.1 0.1 0.2 0.3 0.4 0.4 0.5 0.6 0.7 0.7 12.8 2.2 4.3 6.4 8.6 10.7 .8 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.04.9 0.9 1.7 2.5 3.3 4.1 .9 0.1 0.1 0.2 0.3 0.4 0.4 0.5 0.6 0.7 0.7 12.9 2.2 4.3 6.5 8.6 10.8 .9 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.9 2.1

    5.0 0.8 1.6 2.5 3.3 4.1 .0 0.0 0.1 0.2 0.3 0.4 0.5 0.5 0.6 0.7 0.82.47.212.016.821.626.431.236.0

    13.0 2.1 4.3 6.5 8.6 10.8 .0 0.0 0.2 0.4 0.7 0.9 1.1 1.3 1.6 1.8 2.05.1 0.8 1.7 2.5 3.4 4.2 .1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.7 0.8

    0.10.20.30.40.50.60.7

    13.1 2.2 4.3 6.5 8.7 10.9 .1 0.0 0.2 0.5 0.7 0.9 1.1 1.4 1.6 1.8 2.05.2 0.8 1.7 2.6 3.4 4.3 .2 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.8 13.2 2.2 4.4 6.6 8.8 11.0 .2 0.0 0.3 0.5 0.7 0.9 1.2 1.4 1.6 1.8 2.15.3 0.9 1.8 2.6 3.5 4.4 .3 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 13.3 2.2 4.4 6.6 8.9 11.1 .3 0.1 0.3 0.5 0.7 1.0 1.2 1.4 1.6 1.9 2.15.4 0.9 1.8 2.7 3.6 4.5 .4 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 13.4 2.2 4.5 6.7 8.9 11.2 .4 0.1 0.3 0.5 0.8 1.0 1.2 1.4 1.7 1.9 2.1

    5.5 0.9 1.8 2.8 3.7 4.6 .5 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 13.5 2.3 4.5 6.8 9.0 11.3 .5 0.1 0.3 0.6 0.8 1.0 1.2 1.5 1.7 1.9 2.15.6 0.9 1.9 2.8 3.7 4.7 .6 0.1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 13.6 2.3 4.5 6.8 9.1 11.3 .6 0.1 0.4 0.6 0.8 1.0 1.3 1.5 1.7 1.9 2.25.7 1.0 1.9 2.9 3.8 4.8 .7 0.1 0.2 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 13.7 2.3 4.6 6.9 9.2 11.4 .7 0.2 0.4 0.6 0.8 1.1 1.3 1.5 1.7 2.0 2.25.8 1.0 2.0 2.9 3.9 4.9 .8 0.1 0.2 0.3 0.3 0.4 0.5 0.6 0.7 0.8 0.9 13.8 2.3 4.6 6.9 9.2 11.5 .8 0.2 0.4 0.6 0.9 1.1 1.3 1.5 1.8 2.0 2.25.9 1.0 2.0 3.0 4.0 5.0 .9 0.1 0.2 0.3 0.4 0.4 0.5 0.6 0.7 0.8 0.9 13.9 2.4 4.7 7.0 9.3 11.6 .9 0.2 0.4 0.7 0.9 1.1 1.3 1.6 1.8 2.0 2.2

    6.0 1.0 2.0 3.0 4.0 5.0 .0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.8 0.9 1.02.16.210.414.518.622.826.931.135.2

    14.0 2.3 4.6 7.0 9.3 11.6 .0 0.0 0.2 0.5 0.7 1.0 1.2 1.4 1.7 1.9 2.2

    1.13.25.37.59.6

    11.713.916.018.120.322.424.526.728.830.933.135.2

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.6

    6.1 1.0 2.0 3.0 4.0 5.1 .1 0.0 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.0 0.10.20.30.40.50.60.70.8

    14.1 2.3 4.7 7.0 9.4 11.7 .1 0.0 0.3 0.5 0.7 1.0 1.2 1.5 1.7 2.0 2.26.2 1.0 2.0 3.1 4.1 5.1 .2 0.0 0.1 0.2 0.3 0.5 0.6 0.7 0.8 0.9 1.0 14.2 2.3 4.7 7.1 9.4 11.8 .2 0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.7 2.0 2.26.3 1.0 2.1 3.1 4.2 5.2 .3 0.0 0.1 0.2 0.4 0.5 0.6 0.7 0.8 0.9 1.0 14.3 2.4 4.8 7.1 9.5 11.9 .3 0.1 0.3 0.6 0.8 1.0 1.3 1.5 1.8 2.0 2.26.4 1.1 2.1 3.2 4.3 5.3 .4 0.0 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 14.4 2.4 4.8 7.2 9.6 12.0 .4 0.1 0.3 0.6 0.8 1.1 1.3 1.5 1.8 2.0 2.3

    6.5 1.1 2.2 3.3 4.3 5.4 .5 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 14.5 2.4 4.8 7.3 9.7 12.1 .5 0.1 0.4 0.6 0.8 1.1 1.3 1.6 1.8 2.1 2.36.6 1.1 2.2 3.3 4.4 5.5 .6 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 14.6 2.4 4.9 7.3 9.7 12.2 .6 0.1 0.4 0.6 0.9 1.1 1.4 1.6 1.8 2.1 2.36.7 1.1 2.3 3.4 4.5 5.6 .7 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.1 14.7 2.5 4.9 7.4 9.8 12.3 .7 0.2 0.4 0.7 0.9 1.1 1.4 1.6 1.9 2.1 2.36.8 1.2 2.3 3.4 4.6 5.7 .8 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 1.0 1.1 14.8 2.5 5.0 7.4 9.9 12.4 .8 0.2 0.4 0.7 0.9 1.2 1.4 1.6 1.9 2.1 2.46.9 1.2 2.3 3.5 4.6 5.8 .9 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.9 1.0 1.1 14.9 2.5 5.0 7.5 10.0 12.5 .9 0.2 0.5 0.7 0.9 1.2 1.4 1.7 1.9 2.2 2.4

    7.0 1.1 2.3 3.5 4.6 5.8 .0 0.0 0.1 0.2 0.4 0.5 0.6 0.7 0.9 1.0 1.1 1.85.59.112.816.520.123.827.431.134.7

    0.10.20.30.40.50.60.70.80.9

    15.0 2.5 5.0 7.5 10.0 12.5 .0 0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.1 2.37.1 1.2 2.3 3.5 4.7 5.9 .1 0.0 0.1 0.3 0.4 0.5 0.6 0.8 0.9 1.0 1.1 15.1 2.5 5.0 7.5 10.0 12.6 .1 0.0 0.3 0.5 0.8 1.1 1.3 1.6 1.8 2.1 2.47.2 1.2 2.4 3.6 4.8 6.0 .2 0.0 0.1 0.3 0.4 0.5 0.6 0.8 0.9 1.0 1.1 15.2 2.5 5.0 7.6 10.1 12.6 .2 0.1 0.3 0.6 0.8 1.1 1.3 1.6 1.9 2.1 2.47.3 1.2 2.4 3.6 4.9 6.1 .3 0.0 0.2 0.3 0.4 0.5 0.7 0.8 0.9 1.0 1.2 15.3 2.5 5.1 7.6 10.2 12.7 .3 0.1 0.3 0.6 0.9 1.1 1.4 1.6 1.9 2.1 2.47.4 1.2 2.5 3.7 4.9 6.2 .4 0.0 0.2 0.3 0.4 0.5 0.7 0.8 0.9 1.0 1.2 15.4 2.6 5.1 7.7 10.3 12.8 .4 0.1 0.4 0.6 0.9 1.1 1.4 1.7 1.9 2.2 2.4

    7.5 1.3 2.5 3.8 5.0 6.3 .5 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.1 1.2 15.5 2.6 5.2 7.8 10.3 12.9 .5 0.1 0.4 0.6 0.9 1.2 1.4 1.7 1.9 2.2 2.57.6 1.3 2.5 3.8 5.1 6.3 .6 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.1 1.2 15.6 2.6 5.2 7.8 10.4 13.0 .6 0.2 0.4 0.7 0.9 1.2 1.4 1.7 2.0 2.2 2.57.7 1.3 2.6 3.9 5.2 6.4 .7 0.1 0.2 0.3 0.5 0.6 0.7 0.8 1.0 1.1 1.2 15.7 2.6 5.3 7.9 10.5 13.1 .7 0.2 0.4 0.7 1.0 1.2 1.5 1.7 2.0 2.2 2.57.8 1.3 2.6 3.9 5.2 6.5 .8 0.1 0.2 0.3 0.5 0.6 0.7 0.8 1.0 1.1 1.2 15.8 2.7 5.3 7.9 10.6 13.2 .8 0.2 0.5 0.7 1.0 1.2 1.5 1.8 2.0 2.3 2.57.9 1.4 2.7 4.0 5.3 6.6 .9 0.1 0.2 0.4 0.5 0.6 0.7 0.9 1.0 1.1 1.2 15.9 2.7 5.3 8.0 10.6 13.3 .9 0.2 0.5 0.7 1.0 1.3 1.5 1.8 2.0 2.3 2.6

    10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′

    The Double-Second-Difference correction (Corr.) is always to be added to the tabulated altitude.

  • INTERPOLATION TABLEAltitude Difference (d) Double

    SecondDiff.andCorr.

    Altitude Difference (d) DoubleSecond

    Diff.andCorr.

    Dec.Inc. Tens Decimals Units

    Dec.Inc. Tens Decimals Units

    10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′

    16.0 2.6 5.3 8.0 10.6 13.3 .0 0.0 0.3 0.5 0.8 1.1 1.4 1.6 1.9 2.2 2.5

    1.03.04.96.98.910.812.814.816.718.720.722.724.626.628.630.532.534.5

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.7

    24.0 4.0 8.0 12.0 16.0 20.0 .0 0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.9 3.3 3.7 0.82.54.15.87.49.1

    10.712.314.015.617.318.920.622.223.925.527.228.830.432.133.735.4

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    16.1 2.7 5.3 8.0 10.7 13.4 .1 0.0 0.3 0.6 0.9 1.1 1.4 1.7 2.0 2.2 2.5 24.1 4.0 8.0 12.0 16.0 20.1 .1 0.0 0.4 0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.716.2 2.7 5.4 8.1 10.8 13.5 .2 0.1 0.3 0.6 0.9 1.2 1.4 1.7 2.0 2.3 2.5 24.2 4.0 8.0 12.1 16.1 20.1 .2 0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.816.3 2.7 5.4 8.1 10.9 13.6 .3 0.1 0.4 0.6 0.9 1.2 1.5 1.7 2.0 2.3 2.6 24.3 4.0 8.1 12.1 16.2 20.2 .3 0.1 0.5 0.9 1.3 1.8 2.2 2.6 3.0 3.4 3.816.4 2.7 5.5 8.2 10.9 13.7 .4 0.1 0.4 0.7 0.9 1.2 1.5 1.8 2.0 2.3 2.6 24.4 4.1 8.1 12.2 16.3 20.3 .4 0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0 3.4 3.8

    16.5 2.8 5.5 8.3 11.0 13.8 .5 0.1 0.4 0.7 1.0 1.2 1.5 1.8 2.1 2.3 2.6 24.5 4.1 8.2 12.3 16.3 20.4 .5 0.2 0.6 1.0 1.4 1.8 2.2 2.7 3.1 3.5 3.916.6 2.8 5.5 8.3 11.1 13.8 .6 0.2 0.4 0.7 1.0 1.3 1.5 1.8 2.1 2.4 2.6 24.6 4.1 8.2 12.3 16.4 20.5 .6 0.2 0.7 1.1 1.5 1.9 2.3 2.7 3.1 3.5 3.916.7 2.8 5.6 8.4 11.2 13.9 .7 0.2 0.5 0.7 1.0 1.3 1.6 1.8 2.1 2.4 2.7 24.7 4.1 8.3 12.4 16.5 20.6 .7 0.3 0.7 1.1 1.5 1.9 2.3 2.7 3.1 3.6 4.016.8 2.8 5.6 8.4 11.2 14.0 .8 0.2 0.5 0.8 1.0 1.3 1.6 1.9 2.1 2.4 2.7 24.8 4.2 8.3 12.4 16.6 20.7 .8 0.3 0.7 1.1 1.6 2.0 2.4 2.8 3.2 3.6 4.016.9 2.9 5.7 8.5 11.3 14.1 .9 0.2 0.5 0.8 1.1 1.3 1.6 1.9 2.2 2.4 2.7 24.9 4.2 8.3 12.5 16.6 20.8 .9 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0

    17.0 2.8 5.6 8.5 11.3 14.1 .0 0.0 0.3 0.6 0.9 1.2 1.5 1.7 2.0 2.3 2.6 25.0 4.1 8.3 12.5 16.6 20.8 .0 0.0 0.4 0.8 1.3 1.7 2.1 2.5 3.0 3.4 3.817.1 2.8 5.7 8.5 11.4 14.2 .1 0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 25.1 4.2 8.3 12.5 16.7 20.9 .1 0.0 0.5 0.9 1.3 1.7 2.2 2.6 3.0 3.4 3.917.2 2.8 5.7 8.6 11.4 14.3 .2 0.1 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 25.2 4.2 8.4 12.6 16.8 21.0 .2 0.1 0.5 0.9 1.4 1.8 2.2 2.6 3.1 3.5 3.917.3 2.9 5.8 8.6 11.5 14.4 .3 0.1 0.4 0.7 1.0 1.3 1.5 1.8 2.1 2.4 2.7 25.3 4.2 8.4 12.6 16.9 21.1 .3 0.1 0.6 1.0 1.4 1.8 2.3 2.7 3.1 3.5 4.017.4 2.9 5.8 8.7 11.6 14.5 .4 0.1 0.4 0.7 1.0 1.3 1.6 1.9 2.2 2.4 2.7 25.4 4.2 8.5 12.7 16.9 21.2 .4 0.2 0.6 1.0 1.4 1.9 2.3 2.7 3.1 3.6 4.0

    17.5 2.9 5.8 8.8 11.7 14.6 .5 0.1 0.4 0.7 1.0 1.3 1.6 1.9 2.2 2.5 2.8 25.5 4.3 8.5 12.8 17.0 21.3 .5 0.2 0.6 1.1 1.5 1.9 2.3 2.8 3.2 3.6 4.017.6 2.9 5.9 8.8 11.7 14.7 .6 0.2 0.5 0.8 1.0 1.3 1.6 1.9 2.2 2.5 2.8 25.6 4.3 8.5 12.8 17.1 21.3 .6 0.3 0.7 1.1 1.5 2.0 2.4 2.8 3.2 3.7 4.117.7 3.0 5.9 8.9 11.8 14.8 .7 0.2 0.5 0.8 1.1 1.4 1.7 2.0 2.2 2.5 2.8 25.7 4.3 8.6 12.9 17.2 21.4 .7 0.3 0.7 1.1 1.6 2.0 2.4 2.8 3.3 3.7 4.117.8 3.0 6.0 8.9 11.9 14.9 .8 0.2 0.5 0.8 1.1 1.4 1.7 2.0 2.3 2.6 2.9 25.8 4.3 8.6 12.9 17.2 21.5 .8 0.3 0.8 1.2 1.6 2.0 2.5 2.9 3.3 3.7 4.217.9 3.0 6.0 9.0 12.0 15.0 .9 0.3 0.6 0.8 1.1 1.4 1.7 2.0 2.3 2.6 2.9 25.9 4.4 8.7 13.0 17.3 21.6 .9 0.4 0.8 1.2 1.7 2.1 2.5 2.9 3.4 3.8 4.2

    0.92.84.66.58.310.212.013.915.717.619.421.323.125.026.828.730.532.334.2

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.8

    18.0 3.0 6.0 9.0 12.0 15.0 .0 0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.2 2.5 2.8 26.0 4.3 8.6 13.0 17.3 21.6 .0 0.0 0.4 0.9 1.3 1.8 2.2 2.6 3.1 3.5 4.0 0.82.44.05.77.38.9

    10.512.113.715.417.018.620.221.823.425.126.728.329.931.533.134.7

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    18.1 3.0 6.0 9.0 12.0 15.1 .1 0.0 0.3 0.6 1.0 1.3 1.6 1.9 2.2 2.5 2.8 26.1 4.3 8.7 13.0 17.4 21.7 .1 0.0 0.5 0.9 1.4 1.8 2.3 2.7 3.1 3.6 4.018.2 3.0 6.0 9.1 12.1 15.1 .2 0.1 0.4 0.7 1.0 1.3 1.6 1.9 2.2 2.5 2.8 26.2 4.3 8.7 13.1 17.4 21.8 .2 0.1 0.5 1.0 1.4 1.9 2.3 2.7 3.2 3.6 4.118.3 3.0 6.1 9.1 12.2 15.2 .3 0.1 0.4 0.7 1.0 1.3 1.6 1.9 2.3 2.6 2.9 26.3 4.4 8.8 13.1 17.5 21.9 .3 0.1 0.6 1.0 1.5 1.9 2.3 2.8 3.2 3.7 4.118.4 3.1 6.1 9.2 12.3 15.3 .4 0.1 0.4 0.7 1.0 1.4 1.7 2.0 2.3 2.6 2.9 26.4 4.4 8.8 13.2 17.6 22.0 .4 0.2 0.6 1.1 1.5 1.9 2.4 2.8 3.3 3.7 4.2

    18.5 3.1 6.2 9.3 12.3 15.4 .5 0.2 0.5 0.8 1.1 1.4 1.7 2.0 2.3 2.6 2.9 26.5 4.4 8.8 13.3 17.7 22.1 .5 0.2 0.7 1.1 1.5 2.0 2.4 2.9 3.3 3.8 4.218.6 3.1 6.2 9.3 12.4 15.5 .6 0.2 0.5 0.8 1.1 1.4 1.7 2.0 2.3 2.7 3.0 26.6 4.4 8.9 13.3 17.7 22.2 .6 0.3 0.7 1.1 1.6 2.0 2.5 2.9 3.4 3.8 4.218.7 3.1 6.3 9.4 12.5 15.6 .7 0.2 0.5 0.8 1.1 1.4 1.8 2.1 2.4 2.7 3.0 26.7 4.5 8.9 13.4 17.8 22.3 .7 0.3 0.8 1.2 1.6 2.1 2.5 3.0 3.4 3.8 4.318.8 3.2 6.3 9.4 12.6 15.7 .8 0.2 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 26.8 4.5 9.0 13.4 17.9 22.4 .8 0.4 0.8 1.2 1.7 2.1 2.6 3.0 3.4 3.9 4.318.9 3.2 6.3 9.5 12.6 15.8 .9 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.1 26.9 4.5 9.0 13.5 18.0 22.5 .9 0.4 0.8 1.3 1.7 2.2 2.6 3.0 3.5 3.9 4.4

    19.0 3.1 6.3 9.5 12.6 15.8 .0 0.0 0.3 0.6 1.0 1.3 1.6 1.9 2.3 2.6 2.9 27.0 4.5 9.0 13.5 18.0 22.5 .0 0.0 0.5 0.9 1.4 1.8 2.3 2.7 3.2 3.7 4.119.1 3.2 6.3 9.5 12.7 15.9 .1 0.0 0.4 0.7 1.0 1.3 1.7 2.0 2.3 2.6 3.0 27.1 4.5 9.0 13.5 18.0 22.6 .1 0.0 0.5 1.0 1.4 1.9 2.3 2.8 3.3 3.7 4.219.2 3.2 6.4 9.6 12.8 16.0 .2 0.1 0.4 0.7 1.0 1.4 1.7 2.0 2.3 2.7 3.0 27.2 4.5 9.0 13.6 18.1 22.6 .2 0.1 0.5 1.0 1.5 1.9 2.4 2.8 3.3 3.8 4.219.3 3.2 6.4 9.6 12.9 16.1 .3 0.1 0.4 0.7 1.1 1.4 1.7 2.0 2.4 2.7 3.0 27.3 4.5 9.1 13.6 18.2 22.7 .3 0.1 0.6 1.1 1.5 2.0 2.4 2.9 3.3 3.8 4.319.4 3.2 6.5 9.7 12.9 16.2 .4 0.1 0.5 0.8 1.1 1.4 1.8 2.1 2.4 2.7 3.1 27.4 4.6 9.1 13.7 18.3 22.8 .4 0.2 0.6 1.1 1.6 2.0 2.5 2.9 3.4 3.8 4.3

    19.5 3.3 6.5 9.8 13.0 16.3 .5 0.2 0.5 0.8 1.1 1.5 1.8 2.1 2.4 2.8 3.1 27.5 4.6 9.2 13.8 18.3 22.9 .5 0.2 0.7 1.1 1.6 2.1 2.5 3.0 3.4 3.9 4.419.6 3.3 6.5 9.8 13.1 16.3 .6 0.2 0.5 0.8 1.2 1.5 1.8 2.1 2.5 2.8 3.1 27.6 4.6 9.2 13.8 18.4 23.0 .6 0.3 0.7 1.2 1.6 2.1 2.6 3.0 3.5 3.9 4.419.7 3.3 6.6 9.9 13.2 16.4 .7 0.2 0.6 0.9 1.2 1.5 1.9 2.2 2.5 2.8 3.2 27.7 4.6 9.3 13.9 18.5 23.1 .7 0.3 0.8 1.2 1.7 2.2 2.6 3.1 3.5 4.0 4.419.8 3.3 6.6 9.9 13.2 16.5 .8 0.3 0.6 0.9 1.2 1.6 1.9 2.2 2.5 2.9 3.2 27.8 4.7 9.3 13.9 18.6 23.2 .8 0.4 0.8 1.3 1.7 2.2 2.7 3.1 3.6 4.0 4.519.9 3.4 6.7 10.0 13.3 16.6 .9 0.3 0.6 0.9 1.3 1.6 1.9 2.2 2.6 2.9 3.2 27.9 4.7 9.3 14.0 18.6 23.3 .9 0.4 0.9 1.3 1.8 2.2 2.7 3.2 3.6 4.1 4.5

    20.0 3.3 6.6 10.0 13.3 16.6 .0 0.0 0.3 0.7 1.0 1.4 1.7 2.0 2.4 2.7 3.1

    0.92.64.46.27.99.711.413.214.916.718.520.222.023.725.527.329.030.832.534.3

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.9

    28.0 4.6 9.3 14.0 18.6 23.3 .0 0.0 0.5 0.9 1.4 1.9 2.4 2.8 3.3 3.8 4.3 0.82.44.05.67.28.8

    10.412.013.615.216.818.420.021.623.224.826.428.029.631.232.834.4

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    20.1 3.3 6.7 10.0 13.4 16.7 .1 0.0 0.4 0.7 1.1 1.4 1.7 2.1 2.4 2.8 3.1 28.1 4.7 9.3 14.0 18.7 23.4 .1 0.0 0.5 1.0 1.5 1.9 2.4 2.9 3.4 3.8 4.320.2 3.3 6.7 10.1 13.4 16.8 .2 0.1 0.4 0.8 1.1 1.4 1.8 2.1 2.5 2.8 3.1 28.2 4.7 9.4 14.1 18.8 23.5 .2 0.1 0.6 1.0 1.5 2.0 2.5 2.9 3.4 3.9 4.420.3 3.4 6.8 10.1 13.5 16.9 .3 0.1 0.4 0.8 1.1 1.5 1.8 2.2 2.5 2.8 3.2 28.3 4.7 9.4 14.1 18.9 23.6 .3 0.1 0.6 1.1 1.6 2.0 2.5 3.0 3.5 3.9 4.420.4 3.4 6.8 10.2 13.6 17.0 .4 0.1 0.5 0.8 1.2 1.5 1.8 2.2 2.5 2.9 3.2 28.4 4.7 9.5 14.2 18.9 23.7 .4 0.2 0.7 1.1 1.6 2.1 2.6 3.0 3.5 4.0 4.5

    20.5 3.4 6.8 10.3 13.7 17.1 .5 0.2 0.5 0.9 1.2 1.5 1.9 2.2 2.6 2.9 3.2 28.5 4.8 9.5 14.3 19.0 23.8 .5 0.2 0.7 1.2 1.7 2.1 2.6 3.1 3.6 4.0 4.520.6 3.4 6.9 10.3 13.7 17.2 .6 0.2 0.5 0.9 1.2 1.6 1.9 2.3 2.6 2.9 3.3 28.6 4.8 9.5 14.3 19.1 23.8 .6 0.3 0.8 1.2 1.7 2.2 2.7 3.1 3.6 4.1 4.620.7 3.5 6.9 10.4 13.8 17.3 .7 0.2 0.6 0.9 1.3 1.6 1.9 2.3 2.6 3.0 3.3 28.7 4.8 9.6 14.4 19.2 23.9 .7 0.3 0.8 1.3 1.8 2.2 2.7 3.2 3.7 4.1 4.620.8 3.5 7.0 10.4 13.9 17.4 .8 0.3 0.6 1.0 1.3 1.6 2.0 2.3 2.7 3.0 3.3 28.8 4.8 9.6 14.4 19.2 24.0 .8 0.4 0.9 1.3 1.8 2.3 2.8 3.2 3.7 4.2 4.720.9 3.5 7.0 10.5 14.0 17.5 .9 0.3 0.6 1.0 1.3 1.7 2.0 2.4 2.7 3.0 3.4 28.9 4.9 9.7 14.5 19.3 24.1 .9 0.4 0.9 1.4 1.9 2.3 2.8 3.3 3.8 4.2 4.7

    21.0 3.5 7.0 10.5 14.0 17.5 .0 0.0 0.4 0.7 1.1 1.4 1.8 2.1 2.5 2.9 3.2 29.0 4.8 9.6 14.5 19.3 24.1 .0 0.0 0.5 1.0 1.5 2.0 2.5 2.9 3.4 3.9 4.421.1 3.5 7.0 10.5 14.0 17.6 .1 0.0 0.4 0.8 1.1 1.5 1.8 2.2 2.5 2.9 3.3 29.1 4.8 9.7 14.5 19.4 24.2 .1 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.521.2 3.5 7.0 10.6 14.1 17.6 .2 0.1 0.4 0.8 1.1 1.5 1.9 2.2 2.6 2.9 3.3 29.2 4.8 9.7 14.6 19.4 24.3 .2 0.1 0.6 1.1 1.6 2.1 2.6 3.0 3.5 4.0 4.521.3 3.5 7.1 10.6 14.2 17.7 .3 0.1 0.5 0.8 1.2 1.5 1.9 2.3 2.6 3.0 3.3 29.3 4.9 9.8 14.6 19.5 24.4 .3 0.1 0.6 1.1 1.6 2.1 2.6 3.1 3.6 4.1 4.621.4 3.6 7.1 10.7 14.3 17.8 .4 0.1 0.5 0.9 1.2 1.6 1.9 2.3 2.7 3.0 3.4 29.4 4.9 9.8 14.7 19.6 24.5 .4 0.2 0.7 1.2 1.7 2.2 2.7 3.1 3.6 4.1 4.6

    21.5 3.6 7.2 10.8 14.3 17.9 .5 0.2 0.5 0.9 1.3 1.6 2.0 2.3 2.7 3.0 3.4 29.5 4.9 9.8 14.8 19.7 24.6 .5 0.2 0.7 1.2 1.7 2.2 2.7 3.2 3.7 4.2 4.721.6 3.6 7.2 10.8 14.4 18.0 .6 0.2 0.6 0.9 1.3 1.6 2.0 2.4 2.7 3.1 3.4 29.6 4.9 9.9 14.8 19.7 24.7 .6 0.3 0.8 1.3 1.8 2.3 2.8 3.2 3.7 4.2 4.721.7 3.6 7.3 10.9 14.5 18.1 .7 0.3 0.6 1.0 1.3 1.7 2.0 2.4 2.8 3.1 3.5 29.7 5.0 9.9 14.9 19.8 24.8 .7 0.3 0.8 1.3 1.8 2.3 2.8 3.3 3.8 4.3 4.821.8 3.7 7.3 10.9 14.6 18.2 .8 0.3 0.6 1.0 1.4 1.7 2.1 2.4 2.8 3.2 3.5 29.8 5.0 10.0 14.9 19.9 24.9 .8 0.4 0.9 1.4 1.9 2.4 2.9 3.3 3.8 4.3 4.821.9 3.7 7.3 11.0 14.6 18.3 .9 0.3 0.7 1.0 1.4 1.8 2.1 2.5 2.8 3.2 3.5 29.9 5.0 10.0 15.0 20.0 25.0 .9 0.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9

    22.0 3.6 7.3 11.0 14.6 18.3 .0 0.0 0.4 0.7 1.1 1.5 1.9 2.2 2.6 3.0 3.40.82.54.25.97.69.311.012.714.416.117.819.521.222.824.526.227.929.631.333.034.7

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.0

    30.0 5.0 10.0 15.0 20.0 25.0 .0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.6 4.1 4.6 0.82.44.05.67.28.8

    10.412.013.615.216.818.420.021.623.224.826.428.029.631.232.834.4

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    22.1 3.7 7.3 11.0 14.7 18.4 .1 0.0 0.4 0.8 1.2 1.5 1.9 2.3 2.7 3.0 3.4 30.1 5.0 10.0 15.0 20.0 25.1 .1 0.1 0.6 1.1 1.6 2.1 2.6 3.1 3.6 4.1 4.622.2 3.7 7.4 11.1 14.8 18.5 .2 0.1 0.4 0.8 1.2 1.6 1.9 2.3 2.7 3.1 3.4 30.2 5.0 10.0 15.1 20.1 25.1 .2 0.1 0.6 1.1 1.6 2.1 2.6 3.2 3.7 4.2 4.722.3 3.7 7.4 11.1 14.9 18.6 .3 0.1 0.5 0.9 1.2 1.6 2.0 2.4 2.7 3.1 3.5 30.3 5.0 10.1 15.1 20.2 25.2 .3 0.2 0.7 1.2 1.7 2.2 2.7 3.2 3.7 4.2 4.722.4 3.7 7.5 11.2 14.9 18.7 .4 0.1 0.5 0.9 1.3 1.6 2.0 2.4 2.8 3.1 3.5 30.4 5.1 10.1 15.2 20.3 25.3 .4 0.2 0.7 1.2 1.7 2.2 2.7 3.3 3.8 4.3 4.8

    22.5 3.8 7.5 11.3 15.0 18.8 .5 0.2 0.6 0.9 1.3 1.7 2.1 2.4 2.8 3.2 3.6 30.5 5.1 10.2 15.3 20.3 25.4 .5 0.3 0.8 1.3 1.8 2.3 2.8 3.3 3.8 4.3 4.822.6 3.8 7.5 11.3 15.1 18.8 .6 0.2 0.6 1.0 1.3 1.7 2.1 2.5 2.8 3.2 3.6 30.6 5.1 10.2 15.3 20.4 25.5 .6 0.3 0.8 1.3 1.8 2.3 2.8 3.4 3.9 4.4 4.922.7 3.8 7.6 11.4 15.2 18.9 .7 0.3 0.6 1.0 1.4 1.8 2.1 2.5 2.9 3.3 3.6 30.7 5.1 10.3 15.4 20.5 25.6 .7 0.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.922.8 3.8 7.6 11.4 15.2 19.0 .8 0.3 0.7 1.0 1.4 1.8 2.2 2.5 2.9 3.3 3.7 30.8 5.2 10.3 15.4 20.6 25.7 .8 0.4 0.9 1.4 1.9 2.4 2.9 3.5 4.0 4.5 5.022.9 3.9 7.7 11.5 15.3 19.1 .9 0.3 0.7 1.1 1.5 1.8 2.2 2.6 3.0 3.3 3.7 30.9 5.2 10.3 15.5 20.6 25.8 .9 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

    23.0 3.8 7.6 11.5 15.3 19.1 .0 0.0 0.4 0.8 1.2 1.6 2.0 2.3 2.7 3.1 3.5 31.0 5.1 10.3 15.5 20.6 25.8 .0 0.0 0.5 1.0 1.6 2.1 2.6 3.1 3.7 4.2 4.723.1 3.8 7.7 11.5 15.4 19.2 .1 0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 31.1 5.2 10.3 15.5 20.7 25.9 .1 0.1 0.6 1.1 1.6 2.2 2.7 3.2 3.7 4.3 4.823.2 3.8 7.7 11.6 15.4 19.3 .2 0.1 0.5 0.9 1.3 1.6 2.0 2.4 2.8 3.2 3.6 31.2 5.2 10.4 15.6 20.8 26.0 .2 0.1 0.6 1.2 1.7 2.2 2.7 3.3 3.8 4.3 4.823.3 3.9 7.8 11.6 15.5 19.4 .3 0.1 0.5 0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.6 31.3 5.2 10.4 15.6 20.9 26.1 .3 0.2 0.7 1.2 1.7 2.3 2.8 3.3 3.8 4.4 4.923.4 3.9 7.8 11.7 15.6 19.5 .4 0.2 0.5 0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.7 31.4 5.2 10.5 15.7 20.9 26.2 .4 0.2 0.7 1.3 1.8 2.3 2.8 3.4 3.9 4.4 4.9

    23.5 3.9 7.8 11.8 15.7 19.6 .5 0.2 0.6 1.0 1.4 1.8 2.2 2.5 2.9 3.3 3.7 31.5 5.3 10.5 15.8 21.0 26.3 .5 0.3 0.8 1.3 1.8 2.4 2.9 3.4 3.9 4.5 5.023.6 3.9 7.9 11.8 15.7 19.7 .6 0.2 0.6 1.0 1.4 1.8 2.2 2.6 3.0 3.4 3.8 31.6 5.3 10.5 15.8 21.1 26.3 .6 0.3 0.8 1.4 1.9 2.4 2.9 3.5 4.0 4.5 5.023.7 4.0 7.9 11.9 15.8 19.8 .7 0.3 0.7 1.1 1.4 1.8 2.2 2.6 3.0 3.4 3.8 31.7 5.3 10.6 15.9 21.2 26.4 .7 0.4 0.9 1.4 1.9 2.5 3.0 3.5 4.0 4.6 5.123.8 4.0 8.0 11.9 15.9 19.9 .8 0.3 0.7 1.1 1.5 1.9 2.3 2.7 3.1 3.4 3.8 31.8 5.3 10.6 15.9 21.2 26.5 .8 0.4 0.9 1.5 2.0 2.5 3.0 3.6 4.1 4.6 5.123.9 4.0 8.0 12.0 16.0 20.0 .9 0.4 0.7 1.1 1.5 1.9 2.3 2.7 3.1 3.5 3.9 31.9 5.4 10.7 16.0 21.3 26.6 .9 0.5 1.0 1.5 2.0 2.6 3.1 3.6 4.1 4.7 5.2

    10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′

    The Double-Second-Difference correction (Corr.) is always to be added to the tabulated altitude.

  • INTERPOLATION TABLEAltitude Difference (d) Double

    SecondDiff.andCorr.

    Altitude Difference (d) DoubleSecond

    Diff.andCorr.

    Dec.Inc. Tens Decimals Units

    Dec.Inc. Tens Decimals Units

    10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′

    28.0 4.6 9.3 14.0 18.6 23.3 .0 0.0 0.5 0.9 1.4 1.9 2.4 2.8 3.3 3.8 4.3 0.82.44.05.67.28.810.412.013.615.216.818.420.021.623.224.826.428.029.631.232.834.4

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    36.0 6.0 12.0 18.0 24.0 30.0 .0 0.0 0.6 1.2 1.8 2.4 3.0 3.6 4.3 4.9 5.50.82.54.25.97.69.3

    11.012.714.416.117.819.521.222.824.526.227.929.631.333.034.7

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.0

    28.1 4.7 9.3 14.0 18.7 23.4 .1 0.0 0.5 1.0 1.5 1.9 2.4 2.9 3.4 3.8 4.3 36.1 6.0 12.0 18.0 24.0 30.1 .1 0.1 0.7 1.3 1.9 2.5 3.1 3.7 4.3 4.9 5.528.2 4.7 9.4 14.1 18.8 23.5 .2 0.1 0.6 1.0 1.5 2.0 2.5 2.9 3.4 3.9 4.4 36.2 6.0 12.0 18.1 24.1 30.1 .2 0.1 0.7 1.3 1.9 2.6 3.2 3.8 4.4 5.0 5.628.3 4.7 9.4 14.1 18.9 23.6 .3 0.1 0.6 1.1 1.6 2.0 2.5 3.0 3.5 3.9 4.4 36.3 6.0 12.1 18.1 24.2 30.2 .3 0.2 0.8 1.4 2.0 2.6 3.2 3.8 4.4 5.0 5.728.4 4.7 9.5 14.2 18.9 23.7 .4 0.2 0.7 1.1 1.6 2.1 2.6 3.0 3.5 4.0 4.5 36.4 6.1 12.1 18.2 24.3 30.3 .4 0.2 0.9 1.5 2.1 2.7 3.3 3.9 4.5 5.1 5.7

    28.5 4.8 9.5 14.3 19.0 23.8 .5 0.2 0.7 1.2 1.7 2.1 2.6 3.1 3.6 4.0 4.5 36.5 6.1 12.2 18.3 24.3 30.4 .5 0.3 0.9 1.5 2.1 2.7 3.3 4.0 4.6 5.2 5.828.6 4.8 9.5 14.3 19.1 23.8 .6 0.3 0.8 1.2 1.7 2.2 2.7 3.1 3.6 4.1 4.6 36.6 6.1 12.2 18.3 24.4 30.5 .6 0.4 1.0 1.6 2.2 2.8 3.4 4.0 4.6 5.2 5.828.7 4.8 9.6 14.4 19.2 23.9 .7 0.3 0.8 1.3 1.8 2.2 2.7 3.2 3.7 4.1 4.6 36.7 6.1 12.3 18.4 24.5 30.6 .7 0.4 1.0 1.6 2.3 2.9 3.5 4.1 4.7 5.3 5.928.8 4.8 9.6 14.4 19.2 24.0 .8 0.4 0.9 1.3 1.8 2.3 2.8 3.2 3.7 4.2 4.7 36.8 6.2 12.3 18.4 24.6 30.7 .8 0.5 1.1 1.7 2.3 2.9 3.5 4.1 4.7 5.4 6.028.9 4.9 9.7 14.5 19.3 24.1 .9 0.4 0.9 1.4 1.9 2.3 2.8 3.3 3.8 4.2 4.7 36.9 6.2 12.3 18.5 24.6 30.8 .9 0.5 1.2 1.8 2.4 3.0 3.6 4.2 4.8 5.4 6.0

    29.0 4.8 9.6 14.5 19.3 24.1 .0 0.0 0.5 1.0 1.5 2.0 2.5 2.9 3.4 3.9 4.4 37.0 6.1 12.3 18.5 24.6 30.8 .0 0.0 0.6 1.2 1.9 2.5 3.1 3.7 4.4 5.0 5.629.1 4.8 9.7 14.5 19.4 24.2 .1 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 37.1 6.2 12.3 18.5 24.7 30.9 .1 0.1 0.7 1.3 1.9 2.6 3.2 3.8 4.4 5.1 5.729.2 4.8 9.7 14.6 19.4 24.3 .2 0.1 0.6 1.1 1.6 2.1 2.6 3.0 3.5 4.0 4.5 37.2 6.2 12.4 18.6 24.8 31.0 .2 0.1 0.7 1.4 2.0 2.6 3.2 3.9 4.5 5.1 5.729.3 4.9 9.8 14.6 19.5 24.4 .3 0.1 0.6 1.1 1.6 2.1 2.6 3.1 3.6 4.1 4.6 37.3 6.2 12.4 18.6 24.9 31.1 .3 0.2 0.8 1.4 2.1 2.7 3.3 3.9 4.6 5.2 5.829.4 4.9 9.8 14.7 19.6 24.5 .4 0.2 0.7 1.2 1.7 2.2 2.7 3.1 3.6 4.1 4.6 37.4 6.2 12.5 18.7 24.9 31.2 .4 0.2 0.9 1.5 2.1 2.7 3.4 4.0 4.6 5.2 5.9

    29.5 4.9 9.8 14.8 19.7 24.6 .5 0.2 0.7 1.2 1.7 2.2 2.7 3.2 3.7 4.2 4.7 37.5 6.3 12.5 18.8 25.0 31.3 .5 0.3 0.9 1.6 2.2 2.8 3.4 4.1 4.7 5.3 5.929.6 4.9 9.9 14.8 19.7 24.7 .6 0.3 0.8 1.3 1.8 2.3 2.8 3.2 3.7 4.2 4.7 37.6 6.3 12.5 18.8 25.1 31.3 .6 0.4 1.0 1.6 2.2 2.9 3.5 4.1 4.7 5.4 6.029.7 5.0 9.9 14.9 19.8 24.8 .7 0.3 0.8 1.3 1.8 2.3 2.8 3.3 3.8 4.3 4.8 37.7 6.3 12.6 18.9 25.2 31.4 .7 0.4 1.1 1.7 2.3 2.9 3.6 4.2 4.8 5.4 6.129.8 5.0 10.0 14.9 19.9 24.9 .8 0.4 0.9 1.4 1.9 2.4 2.9 3.3 3.8 4.3 4.8 37.8 6.3 12.6 18.9 25.2 31.5 .8 0.5 1.1 1.7 2.4 3.0 3.6 4.2 4.9 5.5 6.129.9 5.0 10.0 15.0 20.0 25.0 .9 0.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 37.9 6.4 12.7 19.0 25.3 31.6 .9 0.6 1.2 1.8 2.4 3.1 3.7 4.3 4.9 5.6 6.2

    30.0 5.0 10.0 15.0 20.0 25.0 .0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.6 4.1 4.6 0.82.44.05.67.28.810.412.013.615.216.818.420.021.623.224.826.428.029.631.232.834.4

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    38.0 6.3 12.6 19.0 25.3 31.6 .0 0.0 0.6 1.3 1.9 2.6 3.2 3.8 4.5 5.1 5.8

    0.92.64.46.27.99.7

    11.413.214.916.718.520.222.023.725.527.329.030.832.534.3

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.9

    30.1 5.0 10.0 15.0 20.0 25.1 .1 0.1 0.6 1.1 1.6 2.1 2.6 3.1 3.6 4.1 4.6 38.1 6.3 12.7 19.0 25.4 31.7 .1 0.1 0.7 1.3 2.0 2.6 3.3 3.9 4.6 5.2 5.830.2 5.0 10.0 15.1 20.1 25.1 .2 0.1 0.6 1.1 1.6 2.1 2.6 3.2 3.7 4.2 4.7 38.2 6.3 12.7 19.1 25.4 31.8 .2 0.1 0.8 1.4 2.1 2.7 3.3 4.0 4.6 5.3 5.930.3 5.0 10.1 15.1 20.2 25.2 .3 0.2 0.7 1.2 1.7 2.2 2.7 3.2 3.7 4.2 4.7 38.3 6.4 12.8 19.1 25.5 31.9 .3 0.2 0.8 1.5 2.1 2.8 3.4 4.0 4.7 5.3 6.030.4 5.1 10.1 15.2 20.3 25.3 .4 0.2 0.7 1.2 1.7 2.2 2.7 3.3 3.8 4.3 4.8 38.4 6.4 12.8 19.2 25.6 32.0 .4 0.3 0.9 1.5 2.2 2.8 3.5 4.1 4.7 5.4 6.0

    30.5 5.1 10.2 15.3 20.3 25.4 .5 0.3 0.8 1.3 1.8 2.3 2.8 3.3 3.8 4.3 4.8 38.5 6.4 12.8 19.3 25.7 32.1 .5 0.3 1.0 1.6 2.2 2.9 3.5 4.2 4.8 5.5 6.130.6 5.1 10.2 15.3 20.4 25.5 .6 0.3 0.8 1.3 1.8 2.3 2.8 3.4 3.9 4.4 4.9 38.6 6.4 12.9 19.3 25.7 32.2 .6 0.4 1.0 1.7 2.3 3.0 3.6 4.2 4.9 5.5 6.230.7 5.1 10.3 15.4 20.5 25.6 .7 0.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 38.7 6.5 12.9 19.4 25.8 32.3 .7 0.4 1.1 1.7 2.4 3.0 3.7 4.3 4.9 5.6 6.230.8 5.2 10.3 15.4 20.6 25.7 .8 0.4 0.9 1.4 1.9 2.4 2.9 3.5 4.0 4.5 5.0 38.8 6.5 13.0 19.4 25.9 32.4 .8 0.5 1.2 1.8 2.4 3.1 3.7 4.4 5.0 5.6 6.330.9 5.2 10.3 15.5 20.6 25.8 .9 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 38.9 6.5 13.0 19.5 26.0 32.5 .9 0.6 1.2 1.9 2.5 3.1 3.8 4.4 5.1 5.7 6.4

    31.0 5.1 10.3 15.5 20.6 25.8 .0 0.0 0.5 1.0 1.6 2.1 2.6 3.1 3.7 4.2 4.7 39.0 6.5 13.0 19.5 26.0 32.5 .0 0.0 0.7 1.3 2.0 2.6 3.3 3.9 4.6 5.3 5.931.1 5.2 10.3 15.5 20.7 25.9 .1 0.1 0.6 1.1 1.6 2.2 2.7 3.2 3.7 4.3 4.8 39.1 6.5 13.0 19.5 26.0 32.6 .1 0.1 0.7 1.4 2.0 2.7 3.4 4.0 4.7 5.3 6.031.2 5.2 10.4 15.6 20.8 26.0 .2 0.1 0.6 1.2 1.7 2.2 2.7 3.3 3.8 4.3 4.8 39.2 6.5 13.0 19.6 26.1 32.6 .2 0.1 0.8 1.4 2.1 2.8 3.4 4.1 4.7 5.4 6.131.3 5.2 10.4 15.6 20.9 26.1 .3 0.2 0.7 1.2 1.7 2.3 2.8 3.3 3.8 4.4 4.9 39.3 6.5 13.1 19.6 26.2 32.7 .3 0.2 0.9 1.5 2.2 2.8 3.5 4.1 4.8 5.5 6.131.4 5.2 10.5 15.7 20.9 26.2 .4 0.2 0.7 1.3 1.8 2.3 2.8 3.4 3.9 4.4 4.9 39.4 6.6 13.1 19.7 26.3 32.8 .4 0.3 0.9 1.6 2.2 2.9 3.6 4.2 4.9 5.5 6.2

    31.5 5.3 10.5 15.8 21.0 26.3 .5 0.3 0.8 1.3 1.8 2.4 2.9 3.4 3.9 4.5 5.0 39.5 6.6 13.2 19.8 26.3 32.9 .5 0.3 1.0 1.6 2.3 3.0 3.6 4.3 4.9 5.6 6.331.6 5.3 10.5 15.8 21.1 26.3 .6 0.3 0.8 1.4 1.9 2.4 2.9 3.5 4.0 4.5 5.0 39.6 6.6 13.2 19.8 26.4 33.0 .6 0.4 1.1 1.7 2.4 3.0 3.7 4.3 5.0 5.7 6.331.7 5.3 10.6 15.9 21.2 26.4 .7 0.4 0.9 1.4 1.9 2.5 3.0 3.5 4.0 4.6 5.1 39.7 6.6 13.3 19.9 26.5 33.1 .7 0.5 1.1 1.8 2.4 3.1 3.8 4.4 5.1 5.7 6.431.8 5.3 10.6 15.9 21.2 26.5 .8 0.4 0.9 1.5 2.0 2.5 3.0 3.6 4.1 4.6 5.1 39.8 6.7 13.3 19.9 26.6 33.2 .8 0.5 1.2 1.8 2.5 3.2 3.8 4.5 5.1 5.8 6.531.9 5.4 10.7 16.0 21.3 26.6 .9 0.5 1.0 1.5 2.0 2.6 3.1 3.6 4.1 4.7 5.2 39.9 6.7 13.3 20.0 26.6 33.3 .9 0.6 1.3 1.9 2.6 3.2 3.9 4.5 5.2 5.9 6.5

    32.0 5.3 10.6 16.0 21.3 26.6 .0 0.0 0.5 1.1 1.6 2.2 2.7 3.2 3.8 4.3 4.9 0.82.44.05.77.38.910.512.113.715.417.018.620.221.823.425.126.728.329.931.533.134.7

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    40.0 6.6 13.3 20.0 26.6 33.3 .0 0.0 0.7 1.3 2.0 2.7 3.4 4.0 4.7 5.4 6.1

    0.92.84.66.58.3

    10.212.013.915.717.619.421.323.125.026.828.730.532.334.2

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.8

    32.1 5.3 10.7 16.0 21.4 26.7 .1 0.1 0.6 1.1 1.7 2.2 2.8 3.3 3.8 4.4 4.9 40.1 6.7 13.3 20.0 26.7 33.4 .1 0.1 0.7 1.4 2.1 2.8 3.4 4.1 4.8 5.5 6.132.2 5.3 10.7 16.1 21.4 26.8 .2 0.1 0.6 1.2 1.7 2.3 2.8 3.4 3.9 4.4 5.0 40.2 6.7 13.4 20.1 26.8 33.5 .2 0.1 0.8 1.5 2.2 2.8 3.5 4.2 4.9 5.5 6.232.3 5.4 10.8 16.1 21.5 26.9 .3 0.2 0.7 1.2 1.8 2.3 2.9 3.4 4.0 4.5 5.0 40.3 6.7 13.4 20.1 26.9 33.6 .3 0.2 0.9 1.6 2.2 2.9 3.6 4.3 4.9 5.6 6.332.4 5.4 10.8 16.2 21.6 27.0 .4 0.2 0.8 1.3 1.8 2.4 2.9 3.5 4.0 4.5 5.1 40.4 6.7 13.5 20.2 26.9 33.7 .4 0.3 0.9 1.6 2.3 3.0 3.6 4.3 5.0 5.7 6.3

    32.5 5.4 10.8 16.3 21.7 27.1 .5 0.3 0.8 1.4 1.9 2.4 3.0 3.5 4.1 4.6 5.1 40.5 6.8 13.5 20.3 27.0 33.8 .5 0.3 1.0 1.7 2.4 3.0 3.7 4.4 5.1 5.7 6.432.6 5.4 10.9 16.3 21.7 27.2 .6 0.3 0.9 1.4 1.9 2.5 3.0 3.6 4.1 4.7 5.2 40.6 6.8 13.5 20.3 27.1 33.8 .6 0.4 1.1 1.8 2.4 3.1 3.8 4.5 5.1 5.8 6.532.7 5.5 10.9 16.4 21.8 27.3 .7 0.4 0.9 1.5 2.0 2.5 3.1 3.6 4.2 4.7 5.3 40.7 6.8 13.6 20.4 27.2 33.9 .7 0.5 1.1 1.8 2.5 3.2 3.8 4.5 5.2 5.9 6.532.8 5.5 11.0 16.4 21.9 27.4 .8 0.4 1.0 1.5 2.1 2.6 3.1 3.7 4.2 4.8 5.3 40.8 6.8 13.6 20.4 27.2 34.0 .8 0.5 1.2 1.9 2.6 3.2 3.9 4.6 5.3 5.9 6.632.9 5.5 11.0 16.5 22.0 27.5 .9 0.5 1.0 1.6 2.1 2.7 3.2 3.7 4.3 4.8 5.4 40.9 6.9 13.7 20.5 27.3 34.1 .9 0.6 1.3 2.0 2.6 3.3 4.0 4.7 5.3 6.0 6.7

    33.0 5.5 11.0 16.5 22.0 27.5 .0 0.0 0.6 1.1 1.7 2.2 2.8 3.3 3.9 4.5 5.0 41.0 6.8 13.6 20.5 27.3 34.1 .0 0.0 0.7 1.4 2.1 2.8 3.5 4.1 4.8 5.5 6.233.1 5.5 11.0 16.5 22.0 27.6 .1 0.1 0.6 1.2 1.7 2.3 2.8 3.4 4.0 4.5 5.1 41.1 6.8 13.7 20.5 27.4 34.2 .1 0.1 0.8 1.5 2.1 2.8 3.5 4.2 4.9 5.6 6.333.2 5.5 11.0 16.6 22.1 27.6 .2 0.1 0.7 1.2 1.8 2.3 2.9 3.5 4.0 4.6 5.1 41.2 6.8 13.7 20.6 27.4 34.3 .2 0.1 0.8 1.5 2.2 2.9 3.6 4.3 5.0 5.7 6.433.3 5.5 11.1 16.6 22.2 27.7 .3 0.2 0.7 1.3 1.8 2.4 3.0 3.5 4.1 4.6 5.2 41.3 6.9 13.8 20.6 27.5 34.4 .3 0.2 0.9 1.6 2.3 3.0 3.7 4.4 5.0 5.7 6.433.4 5.6 11.1 16.7 22.3 27.8 .4 0.2 0.8 1.3 1.9 2.5 3.0 3.6 4.1 4.7 5.2 41.4 6.9 13.8 20.7 27.6 34.5 .4 0.3 1.0 1.7 2.4 3.0 3.7 4.4 5.1 5.8 6.5

    33.5 5.6 11.2 16.8 22.3 27.9 .5 0.3 0.8 1.4 2.0 2.5 3.1 3.6 4.2 4.7 5.3 41.5 6.9 13.8 20.8 27.7 34.6 .5 0.3 1.0 1.7 2.4 3.1 3.8 4.5 5.2 5.9 6.633.6 5.6 11.2 16.8 22.4 28.0 .6 0.3 0.9 1.5 2.0 2.6 3.1 3.7 4.2 4.8 5.4 41.6 6.9 13.9 20.8 27.7 34.7 .6 0.4 1.1 1.8 2.5 3.2 3.9 4.6 5.3 5.9 6.633.7 5.6 11.3 16.9 22.5 28.1 .7 0.4 0.9 1.5 2.1 2.6 3.2 3.7 4.3 4.9 5.4 41.7 7.0 13.9 20.9 27.8 34.8 .7 0.5 1.2 1.9 2.6 3.3 3.9 4.6 5.3 6.0 6.733.8 5.7 11.3 16.9 22.6 28.2 .8 0.4 1.0 1.6 2.1 2.7 3.2 3.8 4.4 4.9 5.5 41.8 7.0 14.0 20.9 27.9 34.9 .8 0.6 1.2 1.9 2.6 3.3 4.0 4.7 5.4 6.1 6.833.9 5.7 11.3 17.0 22.6 28.3 .9 0.5 1.1 1.6 2.2 2.7 3.3 3.9 4.4 5.0 5.5 41.9 7.0 14.0 21.0 28.0 35.0 .9 0.6 1.3 2.0 2.7 3.4 4.1 4.8 5.5 6.2 6.8

    34.0 5.6 11.3 17.0 22.6 28.3 .0 0.0 0.6 1.1 1.7 2.3 2.9 3.4 4.0 4.6 5.2 0.82.54.15.87.49.110.712.314.015.617.318.920.622.223.925.527.228.830.432.133.735.4

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.71.81.92.02.1

    42.0 7.0 14.0 21.0 28.0 35.0 .0 0.0 0.7 1.4 2.1 2.8 3.5 4.2 5.0 5.7 6.4

    1.03.04.96.98.9

    10.812.814.816.718.720.722.724.626.628.630.532.534.5

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.61.7

    34.1 5.7 11.3 17.0 22.7 28.4 .1 0.1 0.6 1.2 1.8 2.4 2.9 3.5 4.1 4.7 5.2 42.1 7.0 14.0 21.0 28.0 35.1 .1 0.1 0.8 1.5 2.2 2.9 3.6 4.3 5.0 5.7 6.434.2 5.7 11.4 17.1 22.8 28.5 .2 0.1 0.7 1.3 1.8 2.4 3.0 3.6 4.1 4.7 5.3 42.2 7.0 14.0 21.1 28.1 35.1 .2 0.1 0.8 1.6 2.3 3.0 3.7 4.4 5.1 5.8 6.534.3 5.7 11.4 17.1 22.9 28.6 .3 0.2 0.7 1.3 1.9 2.5 3.0 3.6 4.2 4.8 5.3 42.3 7.0 14.1 21.1 28.2 35.2 .3 0.2 0.9 1.6 2.3 3.0 3.8 4.5 5.2 5.9 6.634.4 5.7 11.5 17.2 22.9 28.7 .4 0.2 0.8 1.4 2.0 2.5 3.1 3.7 4.3 4.8 5.4 42.4 7.1 14.1 21.2 28.3 35.3 .4 0.3 1.0 1.7 2.4 3.1 3.8 4.5 5.2 5.9 6.7

    34.5 5.8 11.5 17.3 23.0 28.8 .5 0.3 0.9 1.4 2.0 2.6 3.2 3.7 4.3 4.9 5.5 42.5 7.1 14.2 21.3 28.3 35.4 .5 0.4 1.1 1.8 2.5 3.2 3.9 4.6 5.3 6.0 6.734.6 5.8 11.5 17.3 23.1 28.8 .6 0.3 0.9 1.5 2.1 2.6 3.2 3.8 4.4 4.9 5.5 42.6 7.1 14.2 21.3 28.4 35.5 .6 0.4 1.1 1.8 2.5 3.3 4.0 4.7 5.4 6.1 6.834.7 5.8 11.6 17.4 23.2 28.9 .7 0.4 1.0 1.6 2.1 2.7 3.3 3.9 4.4 5.0 5.6 42.7 7.1 14.3 21.4 28.5 35.6 .7 0.5 1.2 1.9 2.6 3.3 4.0 4.7 5.5 6.2 6.934.8 5.8 11.6 17.4 23.2 29.0 .8 0.5 1.0 1.6 2.2 2.8 3.3 3.9 4.5 5.1 5.6 42.8 7.2 14.3 21.4 28.6 35.7 .8 0.6 1.3 2.0 2.7 3.4 4.1 4.8 5.5 6.2 6.934.9 5.9 11.7 17.5 23.3 29.1 .9 0.5 1.1 1.7 2.2 2.8 3.4 4.0 4.5 5.1 5.7 42.9 7.2 14.3 21.5 28.6 35.8 .9 0.6 1.3 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0

    35.0 5.8 11.6 17.5 23.3 29.1 .0 0.0 0.6 1.2 1.8 2.4 3.0 3.5 4.1 4.7 5.3 43.0 7.1 14.3 21.5 28.6 35.8 .0 0.0 0.7 1.4 2.2 2.9 3.6 4.3 5.1 5.8 6.535.1 5.8 11.7 17.5 23.4 29.2 .1 0.1 0.7 1.2 1.8 2.4 3.0 3.6 4.2 4.8 5.4 43.1 7.2 14.3 21.5 28.7 35.9 .1 0.1 0.8 1.5 2.2 3.0 3.7 4.4 5.1 5.9 6.635.2 5.8 11.7 17.6 23.4 29.3 .2 0.1 0.7 1.3 1.9 2.5 3.1 3.7 4.3 4.9 5.4 43.2 7.2 14.4 21.6 28.8 36.0 .2 0.1 0.9 1.6 2.3 3.0 3.8 4.5 5.2 5.9 6.735.3 5.9 11.8 17.6 23.5 29.4 .3 0.2 0.8 1.4 2.0 2.5 3.1 3.7 4.3 4.9 5.5 43.3 7.2 14.4 21.6 28.9 36.1 .3 0.2 0.9 1.7 2.4 3.1 3.8 4.6 5.3 6.0 6.735.4 5.9 11.8 17.7 23.6 29.5 .4 0.2 0.8 1.4 2.0 2.6 3.2 3.8 4.4 5.0 5.6 43.4 7.2 14.5 21.7 28.9 36.2 .4 0.3 1.0 1.7 2.5 3.2 3.9 4.6 5.4 6.1 6.8

    35.5 5.9 11.8 17.8 23.7 29.6 .5 0.3 0.9 1.5 2.1 2.7 3.3 3.8 4.4 5.0 5.6 43.5 7.3 14.5 21.8 29.0 36.3 .5 0.4 1.1 1.8 2.5 3.3 4.0 4.7 5.4 6.2 6.935.6 5.9 11.9 17.8 23.7 29.7 .6 0.4 0.9 1.5 2.1 2.7 3.3 3.9 4.5 5.1 5.7 43.6 7.3 14.5 21.8 29.1 36.3 .6 0.4 1.2 1.9 2.6 3.3 4.1 4.8 5.5 6.2 7.035.7 6.0 11.9 17.9 23.8 29.8 .7 0.4 1.0 1.6 2.2 2.8 3.4 4.0 4.6 5.1 5.7 43.7 7.3 14.6 21.9 29.2 36.4 .7 0.5 1.2 2.0 2.7 3.4 4.1 4.9 5.6 6.3 7.035.8 6.0 12.0 17.9 23.9 29.9 .8 0.5 1.1 1.7 2.2 2.8 3.4 4.0 4.6 5.2 5.8 43.8 7.3 14.6 21.9 29.2 36.5 .8 0.6 1.3 2.0 2.8 3.5 4.2 4.9 5.7 6.4 7.135.9 6.0 12.0 18.0 24.0 30.0 .9 0.5 1.1 1.7 2.3 2.9 3.5 4.1 4.7 5.3 5.9 43.9 7.4 14.7 22.0 29.3 36.6 .9 0.7 1.4 2.1 2.8 3.6 4.3 5.0 5.7 6.5 7.2

    10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′

    The Double-Second-Difference correction (Corr.) is always to be added to the tabulated altitude.

  • INTERPOLATION TABLEAltitude Difference (d) Double

    SecondDiff.andCorr.

    Altitude Difference (d) DoubleSecond

    Diff.andCorr.

    Dec.Inc. Tens Decimals Units

    Dec.Inc. Tens Decimals Units

    10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ ⇓ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′ ′

    44.0 7.3 14.6 22.0 29.3 36.6 .0 0.0 0.7 1.5 2.2 3.0 3.7 4.4 5.2 5.9 6.7

    1.13.25.37.59.611.713.916.018.120.322.424.526.728.830.933.135.2

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.51.6

    52.0 8.6 17.3 26.0 34.6 43.3 .0 0.0 0.9 1.7 2.6 3.5 4.4 5.2 6.1 7.0 7.9 1.85.59.1

    12.816.520.123.827.431.134.7

    0.10.20.30.40.50.60.70.80.9

    44.1 7.3 14.7 22.0 29.4 36.7 .1 0.1 0.8 1.6 2.3 3.0 3.8 4.5 5.3 6.0 6.7 52.1 8.7 17.3 26.0 34.7 43.4 .1 0.1 1.0 1.8 2.7 3.6 4.5 5.3 6.2 7.1 8.044.2 7.3 14.7 22.1 29.4 36.8 .2 0.1 0.9 1.6 2.4 3.1 3.9 4.6 5.3 6.1 6.8 52.2 8.7 17.4 26.1 34.8 43.5 .2 0.2 1.0 1.9 2.8 3.7 4.5 5.4 6.3 7.2 8.044.3 7.4 14.8 22.1 29.5 36.9 .3 0.2 1.0 1.7 2.4 3.2 3.9 4.7 5.4 6.2 6.9 52.3 8.7 17.4 26.1 34.9 43.6 .3 0.3 1.1 2.0 2.9 3.8 4.6 5.5 6.4 7.3 8.144.4 7.4 14.8 22.2 29.6 37.0 .4 0.3 1.0 1.8 2.5 3.3 4.0 4.7 5.5 6.2 7.0 52.4 8.7 17.5 26.2 34.9 43.7 .4 0.3 1.2 2.1 3.0 3.8 4.7 5.6 6.5 7.3 8.2

    44.5 7.4 14.8 22.3 29.7 37.1 .5 0.4 1.1 1.9 2.6 3.3 4.1 4.8 5.6 6.3 7.0 52.5 8.8 17.5 26.3 35.0 43.8 .5 0.4 1.3 2.2 3.1 3.9 4.8 5.7 6.6 7.4 8.344.6 7.4 14.9 22.3 29.7 37.2 .6 0.4 1.2 1.9 2.7 3.4 4.2 4.9 5.6 6.4 7.1 52.6 8.8 17.5 26.3 35.1 43.8 .6 0.5 1.4 2.3 3.1 4.0 4.9 5.8 6.6 7.5 8.444.7 7.5 14.9 22.4 29.8 37.3 .7 0.5 1.3 2.0 2.7 3.5 4.2 5.0 5.7 6.5 7.2 52.7 8.8 17.6 26.4 35.2 43.9 .7 0.6 1.5 2.4 3.2 4.1 5.0 5.9 6.7 7.6 8.544.8 7.5 15.0 22.4 29.9 37.4 .8 0.6 1.3 2.1 2.8 3.6 4.3 5.0 5.8 6.5 7.3 52.8 8.8 17.6 26.4 35.2 44.0 .8 0.7 1.6 2.4 3.3 4.2 5.1 5.9 6.8 7.7 8.644.9 7.5 15.0 22.5 30.0 37.5 .9 0.7 1.4 2.2 2.9 3.6 4.4 5.1 5.9 6.6 7.3 52.9 8.9 17.7 26.5 35.3 44.1 .9 0.8 1.7 2.5 3.4 4.3 5.2 6.0 6.9 7.8 8.7

    45.0 7.5 15.0 22.5 30.0 37.5 .0 0.0 0.8 1.5 2.3 3.0 3.8 4.5 5.3 6.1 6.8 53.0 8.8 17.6 26.5 35.3 44.1 .0 0.0 0.9 1.8 2.7 3.6 4.5 5.3 6.2 7.1 8.02.16.2

    10.414.518.622.826.931.135.2

    0.10.20.30.40.50.60.70.8

    45.1 7.5 15.0 22.5 30.0 37.6 .1 0.1 0.8 1.6 2.4 3.1 3.9 4.6 5.4 6.1 6.9 53.1 8.8 17.7 26.5 35.4 44.2 .1 0.1 1.0 1.9 2.8 3.7 4.5 5.4 6.3 7.2 8.145.2 7.5 15.0 22.6 30.1 37.6 .2 0.2 0.9 1.7 2.4 3.2 3.9 4.7 5.5 6.2 7.0 53.2 8.8 17.7 26.6 35.4 44.3 .2 0.2 1.1 2.0 2.9 3.7 4.6 5.5 6.4 7.3 8.245.3 7.5 15.1 22.6 30.2 37.7 .3 0.2 1.0 1.7 2.5 3.3 4.0 4.8 5.5 6.3 7.1 53.3 8.9 17.8 26.6 35.5 44.4 .3 0.3 1.2 2.1 2.9 3.8 4.7 5.6 6.5 7.4 8.345.4 7.6 15.1 22.7 30.3 37.8 .4 0.3 1.1 1.8 2.6 3.3 4.1 4.9 5.6 6.4 7.1 53.4 8.9 17.8 26.7 35.6 44.5 .4 0.4 1.2 2.1 3.0 3.9 4.8 5.7 6.6 7.5 8.4

    45.5 7.6 15.2 22.8 30.3 37.9 .5 0.4 1.1 1.9 2.7 3.4 4.2 4.9 5.7 6.4 7.2 53.5 8.9 17.8 26.8 35.7 44.6 .5 0.4 1.3 2.2 3.1 4.0 4.9 5.8 6.7 7.6 8.545.6 7.6 15.2 22.8 30.4 38.0 .6 0.5 1.2 2.0 2.7 3.5 4.2 5.0 5.8 6.5 7.3 53.6 8.9 17.9 26.8 35.7 44.7 .6 0.5 1.4 2.3 3.2 4.1 5.0 5.9 6.8 7.7 8.645.7 7.6 15.3 22.9 30.5 38.1 .7 0.5 1.3 2.0 2.8 3.6 4.3 5.1 5.8 6.6 7.4 53.7 9.0 17.9 26.9 35.8 44.8 .7 0.6 1.5 2.4 3.3 4.2 5.1 6.0 6.9 7.8 8.645.8 7.7 15.3 22.9 30.6 38.2 .8 0.6 1.4 2.1 2.9 3.6 4.4 5.2 5.9 6.7 7.4 53.8 9.0 18.0 26.9 35.9 44.9 .8 0.7 1.6 2.5 3.4 4.3 5.2 6.1 7.0 7.8 8.745.9 7.7 15.3 23.0 30.6 38.3 .9 0.7 1.4 2.2 3.0 3.7 4.5 5.2 6.0 6.7 7.5 53.9 9.0 18.0 27.0 36.0 45.0 .9 0.8 1.7 2.6 3.5 4.4 5.3 6.2 7.0 7.9 8.8

    46.0 7.6 15.3 23.0 30.6 38.3 .0 0.0 0.8 1.5 2.3 3.1 3.9 4.6 5.4 6.2 7.0 1.23.55.88.110.512.815.117.419.822.124.426.729.131.433.736.0

    0.10.20.30.40.50.60.70.80.91.01.11.21.31.41.5

    54.0 9.0 18.0 27.0 36.0 45.0 .0 0.0 0.9 1.8 2.7 3.6 4.5 5.4 6.4 7.3 8.2

    2.47.2

    12.016.821.626.431.236.0

    0.10.20.30.40.50.60.7

    46.1 7.7 15.3 23.0 30.7 38.4 .1 0.1 0.9 1.6 2.4 3.2 4.0 4.7 5.5 6.3 7.1 54.1 9.0 18.0 27.0 36.0 45.1 .1 0.1 1.0 1.9 2.8 3.7 4.6 5.5 6.4 7.4 8.346.2 7.7 15.4 23.1 30.8 38.5 .2 0.2 0.9 1.7 2.5 3.3 4.0 4.8 5.6 6.4 7.1 54.2 9.0 18.0 27.1 36.1 45.1 .2 0.2 1.1 2.0 2.9 3.8 4.7 5.6 6.5 7.4 8.446.3 7.7 15.4 23.1 30.9 38.6 .3 0.2 1.0 1.8 2.6 3.3 4.1 4.9 5.7 6.4 7.2 54.3 9.0 18.1 27.1 36.2 45.2 .3 0.3 1.2 2.1 3.0 3.9 4.8 5.7 6.6 7.5 8.446.4 7.7 15.5 23.2 30.9 38.7 .4 0.3 1.1 1.9 2.6 3.4 4.2 5.0 5.7 6.5 7.3 54.4 9.1 18.1 27.2 36.3 45.3 .4 0.4 1.3 2.2 3.1 4.0 4.9 5.8 6.7 7.6 8.5

    46.5 7.8 15.5 23.3 31.0 38.8 .5 0.4 1.2 1.9 2.7 3.5 4.3 5.0 5.8 6.6 7.4 54.5 9.1 18.2 27.3 36.3 45.4 .5 0.5 1.4 2.3 3.2 4.1 5.0 5.9 6.8 7.7 8.646.6 7.8 15.5 23.3 31.1 38.8 .6 0.5 1.2 2.0 2.8 3.6 4.3 5.1 5.9 6.7 7.4 54.6 9.1 18.2 27.3 36.4 45.5 .6 0.5 1.5 2.4 3.3 4.2 5.1 6.0 6.9 7.8 8.746.7 7.8 15.6 23.4 31.2 38.9 .7 0.5 1.3 2.1 2.9 3.6 4.4 5.2 6.0 6.7 7.5 54.7 9.1 18.3 27.4 36.5 45.6 .7 0.6 1.5 2.5 3.4 4.3 5.2 6.1 7.0 7.9 8.846.8 7.8 15.6 23.4 31.2 39.0 .8 0.6 1.4 2.2 2.9 3.7 4.5 5.3 6.0 6.8 7.6 54.8 9.2 18.3 27.4 36.6 45.7 .8 0.7 1.6 2.5 3.5 4.4 5.3 6.2 7.1 8.0 8.946.9 7.9 15.7 23.5 31.3 39.1 .9 0.7 1.5 2.2 3.0 3.8 4.6 5.3 6.1 6.9 7.7 54.9 9.2 18.3 27.5 36.6 45.8 .9 0.8 1.7 2.6 3.5 4.5 5.4 6.3 7.2 8.1 9.0

    47.0 7.8 15.6 23.5 31.3 39.1 .0 0.0 0.8 1.6 2.4 3.2 4.0 4.7 5.5 6.3 7.1 55.0 9.1 18.3 27.5 36.6 45.8 .0 0.0 0.9 1.8 2.8 3.7 4.6 5.5 6.5 7.4 8.3

    2.98.6

    14.420.225.931.737.5

    0.10.20.30.40.50.6

    47.1 7.8 15.7 23.5 31.4 39.2 .1 0.1 0.9 1.7 2.5 3.2 4.0 4.8 5.6 6.4 7.2 55.1 9.2 18.3 27.5 36.7 45.9 .1 0.1 1.0 1.9 2.9 3.8 4.7 5.6 6.6 7.5 8.447.2 7.8 15.7 23.6 31.4 39.3 .2 0.2 0.9 1.7 2.5 3.3 4.1 4.9 5.7 6.5 7.3 55.2 9.2 18.4 27.6 36.8 46.0 .2 0.2 1.1 2.0 3.0 3.9 4.8 5.7 6.7 7.6 8.547.3 7.9 15.8 23.6 31.5 39.4 .3 0.2 1.0 1.8 2.6 3.4 4.2 5.0 5.8 6.6 7.4 55.3 9.2 18.4 27.6 36.9 46.1 .3 0.3 1.2 2.1 3.1 4.0 4.9 5.8 6.8 7.7 8.647.4 7.9 15.8 23.7 31.6 39.5 .4 0.3 1.1 1.9 2.7 3.5 4.3 5.1 5.9 6.6 7.4 55.4 9.2 18.5 27.7 36.9 46.2 .4 0.4 1.3 2.2 3.1 4.1 5.0 5.9 6.8 7.8 8.7

    47.5 7.9 15.8 23.8 31.7 39.6 .5 0.4 1.2 2.0 2.8 3.6 4.4 5.1 5.9 6.7 7.5

    1.33.86.38.911.414.016.519.021.624.126.729.231.734.3

    0.10.20.30.40.50.60.70.80.91.01.11.21.3

    55.5 9.3 18.5 27.8 37.0 46.3 .5 0.5 1.4 2.3 3.2 4.2 5.1 6.0 6.9 7.9 8.847.6 7.9 15.9 23.8 31.7 39.7 .6 0.5 1.3 2.1 2.8 3.6 4.4 5.2 6.0 6.8 7.6 55.6 9.3 18.5 27.8 37.1 46.3 .6 0.6 1.5 2.4 3.3 4.3 5.2 6.1 7.0 8.0 8.947.7 8.0 15.9 23.9 31.8 39.8 .7 0.6 1.3 2.1 2.9 3.7 4.5 5.3 6.1 6.9 7.7 55.7 9.3 18.6 27.9 37.2 46.4 .7 0.6 1.6 2.5 3.4 4.3 5.3 6.2 7.1 8.0 9.047.8 8.0 16.0 23.9 31.9 39.9 .8 0.6 1.4 2.2 3.0 3.8 4.6 5.4 6.2 7.0 7.8 55.8 9.3 18.6 27.9 37.2 46.5 .8 0.7 1.7 2.6 3.5 4.4 5.4 6.3 7.2 8.1 9.147.9 8.0 16.0 24.0 32.0 40.0 .9 0.7 1.5 2.3 3.1 3.9 4.7 5.5 6.3 7.0 7.8 55.9 9.4 18.7 28.0 37.3 46.6 .9 0.8 1.8 2.7 3.6 4.5 5.5 6.4 7.3 8.2 9.2

    48.0 8.0 16.0 24.0 32.0 40.0 .0 0.0 0.8 1.6 2.4 3.2 4.0 4.8 5.7 6.5 7.3 56.0 9.3 18.6 28.0 37.3 46.6 .0 0.0 0.9 1.9 2.8 3.8 4.7 5.6 6.6 7.5 8.5

    3.610.918.225.532.840.1

    0.10.20.30.40.5

    48.1 8.0 16.0 24.0 32.0 40.1 .1 0.1 0.9 1.7 2.5 3.3 4.1 4.9 5.7 6.5 7.4 56.1 9.3 18.7 28.0 37.4 46.7 .1 0.1 1.0 2.0 2.9 3.9 4.8 5.7 6.7 7.6 8.648.2 8.0 16.0 24.1 32.1 40.1 .2 0.2 1.0 1.8 2.6 3.4 4.2 5.0 5.8 6.6 7.4 56.2 9.3 18.7 28.1 37.4 46.8 .2 0.2 1.1 2.1 3.0 4.0 4.9 5.8 6.8 7.7 8.748.3 8.0 16.1 24.1 32.2 40.2 .3 0.2 1.1 1.9 2.7 3.5 4.3 5.1 5.9 6.7 7.5 56.3 9.4 18.8 28.1 37.5 46.9 .3 0.3 1.2 2.2 3.1 4.0 5.0 5.9 6.9 7.8 8.848.4 8.1 16.1 24.2 32.3 40.3 .4 0.3 1.1 1.9 2.7 3.6 4.4 5.2 6.0 6.8 7.6 56.4 9.4 18.8 28.2 37.6 47.0 .4 0.4 1.3 2.3 3.2 4.1 5.1 6.0 7.0 7.9 8.9

    48.5 8.1 16.2 24.3 32.3 40.4 .5 0.4 1.2 2.0 2.8 3.6 4.4 5.3 6.1 6.9 7.7 56.5 9.4 18.8 28.3 37.7 47.1 .5 0.5 1.4 2.4 3.3 4.2 5.2 6.1 7.1 8.0 8.948.6 8.1 16.2 24.3 32.4 40.5 .6 0.5 1.3 2.1 2.9 3.7 4.5 5.3 6.1 7.0 7.8 56.6 9.4 18.9 28.3 37.7 47.2 .6 0.6 1.5 2.4 3.4 4.3 5.3 6.2 7.2 8.1 9.048.7 8.1 16.3 24.4 32.5 40.6 .7 0.6 1.4 2.2 3.0 3.8 4.6 5.4 6.2 7.0 7.8 56.7 9.5 18.9 28.4 37.8 47.3 .7 0.7 1.6 2.5 3.5 4.4 5.4 6.3 7.3 8.2 9.148.8 8.2 16.3 24.4 32.6 40.7 .8 0.6 1.5 2.3 3.1 3.9 4.7 5.5 6.3 7.1 7.9 56.8 9.5 19.0 28.4 37.9 47.4 .8 0.8 1.7 2.6 3.6 4.5 5.5 6.4 7.3 8.3 9.248.9 8.2 16.3 24.5 32.6 40.8 .9 0.7 1.5 2.3 3.2 4.0 4.8 5.6 6.4 7.2 8.0 56.9 9.5 19.0 28.5 38.0 47.5 .9 0.8 1.8 2.7 3.7 4.6 5.6 6.5 7.4 8.4 9.3

    49.0 8.1 16.3 24.5 32.6 40.8 .0 0.0 0.8 1.6 2.5 3.3 4.1 4.9 5.8 6.6 7.4

    1.44.27.19.912.715.518.421.224.026.829.732.535.3

    0.10.20.30.40.50.60.70.80.91.01.11.2

    57.0 9.5 19.0 28.5 38.0 47.5 .0 0.0 1.0 1.9 2.9 3.8 4.8 5.7 6.7 7.7 8.6

    5.015.025.035.1

    0.10.20.3

    49.1 8.2 16.3 24.5 32.7 40.9 .1 0.1 0.9 1.7 2.6 3.4 4.2 5.0 5.9 6.7 7.5 57.1 9.5 19.0 28.5 38.0 47.6 .1 0.1 1.1 2.0 3.0 3.9 4.9 5.8 6.8 7.8 8.749.2 8.2 16.4 24.6 32.8 41.0 .2 0.2 1.0 1.8 2.6 3.5 4.3 5.1 5.9 6.8 7.6 57.2 9.5 19.0 28.6 38.1 47.6 .2 0.2 1.1 2.1 3.1 4.0 5.0 5.9 6.9 7.9 8.849.3 8.2 16.4 24.6 32.9 41.1 .3 0.2 1.1 1.9 2.7 3.5 4.4 5.2 6.0 6.8 7.7 57.3 9.5 19.1 28.6 38.2 47.7 .3 0.3 1.2 2.2 3.2 4.1 5.1 6.0 7.0 8.0 8.949.4 8.2 16.5 24.7 32.9 41.2 .4 0.3 1.2 2.0 2.8 3.6 4.5 5.3 6.1 6.9 7.8 57.4 9.6 19.1 28.7 38.3 47.8 .4 0.4 1.3 2.3 3.3 4.2 5.2 6.1 7.1 8.0 9.0

    49.5 8.3 16.5 24.8 33.0 41.3 .5 0.4 1.2 2.1 2.9 3.7 4.5 5.4 6.2 7.0 7.8 57.5 9.6 19.2 28.8 38.3 47.9 .5 0.5 1.4 2.4 3.4 4.3 5.3 6.2 7.2 8.1 9.149.6 8.3 16.5 24.8 33.1 41.3 .6 0.5 1.3 2.1 3.0 3.8 4.6 5.4 6.3 7.1 7.9 57.6 9.6 19.2 28.8 38.4 48.0 .6 0.6 1.5 2.5 3.4 4.4 5.4 6.3 7.3 8.2 9.249.7 8.3 16.6 24.9 33.2 41.4 .7 0.6 1.4 2.2 3.1 3.9 4.7 5.5 6.4 7.2 8.0 57.7 9.6 19.3 28.9 38.5 48.1 .7 0.7 1.6 2.6 3.5 4.5 5.5 6.4 7.4 8.3 9.349.8 8.3 16.6 24.9 33.2 41.5 .8 0.7 1.5 2.3 3.1 4.0 4.8 5.6 6.4 7.3 8.1 57.8 9.7 19.3 28.9 38.6 48.2 .8 0.8 1.7 2.7 3.6 4.6 5.6 6.5 7.5 8.4 9.449.9 8.4 16.7 25.0 33.3 41.6 .9 0.7 1.6 2.4 3.2 4.0 4.9 5.7 6.5 7.3 8.2 57.9 9.7 19.3 29.0 38.6 48.3 .9 0.9 1.8 2.8 3.7 4.7 5.7 6.6 7.6 8.5 9.5

    50.0 8.3 16.6 25.0 33.3 41.6 .0 0.0 0.8 1.7 2.5 3.4 4.2 5.0 5.9 6.7 7.6 58.0 9.6 19.3 29.0 38.6 48.3 .0 0.0 1.0 1.9 2.9 3.9 4.9 5.8 6.8 7.8 8.8

    8.224.641.0

    0.10.2

    50.1 8.3 16.7 25.0 33.4 41.7 .1 0.1 0.9 1.8 2.6 3.5 4.3 5.1 6.0 6.8 7.7 58.1 9.7 19.3 29.0 38.7 48.4 .1 0.1 1.1 2.0 3.0 4.0 5.0 5.9 6.9 7.9 8.950.2 8.3 16.7 25.1 33.4 41.8 .2 0.2 1.0 1.9 2.7 3.5 4.4 5.2 6.1 6.9 7.7 58.2 9.7 19.4 29.1 38.8 48.5 .2 0.2 1.2 2.1 3.1 4.1 5.1 6.0 7.0 8.0 9.050.3 8.4 16.8 25.1 33.5 41.9 .3 0.3 1.1 1.9 2.8 3.6 4.5 5.3 6.1 7.0 7.8 58.3 9.7 19.4 29.1 38.9 48.6 .3 0.3 1.3 2.2 3.2 4.2 5.2 6.1 7.1 8.1 9.150.4 8.4 16.8 25.2 33.6 42.0 .4 0.3 1.2 2.0 2.9 3.7 4.5 5.4 6.2 7.1 7.9 58.4 9.7 19.5 29.2 38.9 48.7 .4 0.4 1.4 2.3 3.3 4.3 5.3 6.2 7.2 8.2 9.2

    50.5 8.4 16.8 25.3 33.7 42.1 .5 0.4 1.3 2.1 2.9 3.8 4.6 5.5 6.3 7.2 8.0

    1.64.88.011.214.517.720.924.127.330.533.736.9

    0.10.20.30.40.50.60.70.80.91.01.1

    58.5 9.8 19.5 29.3 39.0 48.8 .5 0.5 1.5 2.4 3.4 4.4 5.4 6.3 7.3 8.3 9.350.6 8.4 16.9 25.3 33.7 42.2 .6 0.5 1.3 2.2 3.0 3.9 4.7 5.6 6.4 7.2 8.1 58.6 9.8 19.5 29.3 39.1 48.8 .6 0.6 1.6 2.5 3.5 4.5 5.5 6.4 7.4 8.4 9.450.7 8.5 16.9 25.4 33.8 42.3 .7 0.6 1.4 2.3 3.1 4.0 4.8 5.6 6.5 7.3 8.2 58.7 9.8 19.6 29.4 39.2 48.9 .7 0.7 1.7 2.6 3.6 4.6 5.6 6.5 7.5 8.5 9.550.8 8.5 17.0 25.4 33.9 42.4 .8 0.7 1.5 2.4 3.2 4.0 4.9 5.7 6.6 7.4 8.2 58.8 9.8 19.6 29.4 39.2 49.0 .8 0.8 1.8 2.7 3.7 4.7 5.7 6.6 7.6 8.6 9.650.9 8.5 17.0 25.5 34.0 42.5 .9 0.8 1.6 2.4 3.3 4.1 5.0 5.8 6.6 7.5 8.3 58.9 9.9 19.7 29.5 39.3 49.1 .9 0.9 1.9 2.8 3.8 4.8 5.8 6.7 7.7 8.7 9.7

    51.0 8.5 17.0 25.5 34.0 42.5 .0 0.0 0.9 1.7 2.6 3.4 4.3 5.1 6.0 6.9 7.7 59.0 9.8 19.6 29.5 39.3 49.1 .0 0.0 1.0 2.0 3.0 4.0 5.0 5.9 6.9 7.9 8.9

    16.248.6 0.1

    51.1 8.5 17.0 25.5 34.0 42.6 .1 0.1 0.9 1.8 2.7 3.5 4.4 5.2 6.1 7.0 7.8 59.1 9.8 19.7 29.5 39.4 49.2 .1 0.1 1.1 2.1 3.1 4.1 5.1 6.0 7.0 8.0 9.051.2 8.5 17.0 25.6 34.1 42.6 .2 0.2 1.0 1.9 2.7 3.6 4.5 5.3 6.2 7.0 7.9 59.2 9.8 19.7 29.6 39.4 49.3 .2 0.2 1.2 2.2 3.2 4.2 5.2 6.1 7.1 8.1 9.151.3 8.5 17.1 25.6 34.2 42.7 .3 0.3 1.1 2.0 2.8 3.7 4.5 5.4 6.3 7.1 8.0 59.3 9.9 19.8 29.6 39.5 49.4 .3 0.3 1.3 2.3 3.3 4.3 5.3 6.2 7.2 8.2 9.251.4 8.6 17.1 25.7 34.3 42.8 .4 0.3 1.2 2.1 2.9 3.8 4.6 5.5 6.4 7.2 8.1 59.4 9.9 19.8 29.7 39.6 49.5 .4 0.4 1.4 2.4 3.4 4.4 5.4 6.3 7.3 8.3 9.3

    51.5 8.6 17.2 25.8 34.3 42.9 .5 0.4 1.3 2.1 3.0 3.9 4.7 5.6 6.4 7.3 8.2 59.5 9.9 19.8 29.8 39.7 49.6 .5 0.5 1.5 2.5 3.5 4.5 5.5 6.4 7.4 8.4 9.4

    0.048.2 0.0

    51.6 8.6 17.2 25.8 34.4 43.0 .6 0.5 1.4 2.2 3.1 3.9 4.8 5.7 6.5 7.4 8.2 59.6 9.9 19.9 29.8 39.7 49.7 .6 0.6 1.6 2.6 3.6 4.6 5.6 6.5 7.5 8.5 9.551.7 8.6 17.3 25.9 34.5 43.1 .7 0.6 1.5 2.3 3.2 4.0 4.9 5.8 6.6 7.5 8.3 59.7 10.0 19.9 29.9 39.8 49.8 .7 0.7 1.7 2.7 3.7 4.7 5.7 6.6 7.6 8.6 9.651.8 8.7 17.3 25.9 34.6 43.2 .8 0.7 1.5 2.4 3.3 4.1 5.0 5.8 6.7 7.6 8.4 59.8 10.0 20.0 29.9 39.9 49.9 .8 0.8 1.8 2.8 3.8 4.8 5.8 6.7 7.7 8.7 9.751.9 8.7 17.3 26.0 34.6 43.3 .9 0.8 1.6 2.5 3.3 4.2 5.1 5.9 6.8 7.6 8.5 59.9 10.0 20.0 30.0 40.0 50.0 .9 0.9 1.9 2.9 3.9 4.9 5.9 6.8 7.8 8.8 9.8

    10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′ 10′ 20′ 30′ 40′ 50′ 0′ 1′ 2′ 3′ 4′ 5′ 6′ 7′ 8′ 9′

    The Double-Second-Difference correction (Corr.) is always to be added to the tabulated altitude.

  • III

    PREFACE

    This six-volume series ofSight Reduction Tables for Marine Navigationis designed to facilitate thepractice of celestial navigation at sea by the Marcq Saint Hilaire or intercept method.

    The tabular data are the solutions of the navigational triangle of which two sides and the included angleare known and it is necessary to find the values of the third side and adjacent angle.

    The tables, intended for use withThe Nautical Almanac, are designed for precise interpolation ofaltitude for declination by means of interpolation tables which facilitate linear interpolation and provideadditionally for the effect of second differences when required.

    The diagrams for additional interpolation of the altitude for latitude and local hour angle increments,which were in each volume of the first printing of the tables, have been omitted from the reprint of thisvolume.

    The concept, design, development, and preparation of these tables are the results of the collaborativeefforts and joint accomplishments of the National Imagery and Mapping Agency, the U.S. NavalObservatory, and Her Majesty’s Nautical Almanac Office, Royal Greenwich Observatory. The tabularmaterial in identical format has been published in the United Kingdom by the Hydrographic Department,Ministry of Defence (Navy), as N.P. 401.

    This reprint was compiled on a Hewlett Packard K420 server with an HP C180 client workstation, and wascomposed in its entirety as a digital document.

    Users should refer corrections, additions, and comments for improving this product to:

    MARITIME SAFETY INFORMATION CENTERST D 44NATIONAL IMAGERY AND MAPPING AGENCY4600 SANGAMORE ROADBETHESDA MD 20816-5003

  • IV

    CONTENTS

    PagePREFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IIIINTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V

    A. DESCRIPTION OF TABLES1. Purpose and Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V2. Arrangement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V

    B. INTERPOLATION1. Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .X2. First and Second Differences. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .X3. Linear Interpolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .X4. The Interpolation Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XI5. Interpolation when Second Differences are Required. . . . . . . . . . . . . . . . . . . . . . . . .XIII

    C. SPECIAL TECHNIQUES1. Adjustment of Straight Line of Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XV2. Interpolation for Latitude and Local Hour Angle . . . . . . . . . . . . . . . . . . . . . . . . . . .XVII3. Interpolation near the Horizon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XVII4. Negative Altitudes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XVIII5. Interpolation near the Zenith. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XVIII

    D. OTHER APPLICATIONS1. Star Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XIX2. Great-Circle Sailing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XX3. Points along Great Circle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XXIII4. General Spherical Triangle Solutions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XXIII5. Compass Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XXIV

    E. BACKGROUND1. Accuracy of Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XXV2. Computation Formulas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XXV

    F. GLOSSARY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XXVIG. EXAMPLE SIGHT REDUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XXIX

    TABLE OF OFFSETS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .XVISIGHT REDUCTION TABLES

    Latitudes 45° to 52° . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-183Latitudes 53° to 60° . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184-365

    INTERPOLATION TABLEDeclination Increment0.0′ to 31.9′ . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside front coverDeclination Increment28.0′ to 59.9′. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Inside back cover

  • V

    INTRODUCTION

    A. DESCRIPTION OF TABLES

    1. Purpose and Scope.The main purpose of these tables is to facilitate the practice of celestialnavigation at sea. A secondary purpose is to provide, within the limitations of the tabular precision andinterval, a table of the solutions of a spherical triangle of which two sides and the included angle are knownand it is necessary to find the values of the third side and adjacent angle.

    The tables have been designed primarily for use with the Marcq Saint Hilaire or intercept method ofsight reduction, utilizing a position assumed or chosen so that interpolation for latitude and local hour angleis not required.

    For entering arguments of integral degrees of latitude, declination, and local hour angle, altitudes andtheir differences are tabulated to the nearest tenth of a minute, azimuth angles to the nearest tenth of adegree. But the tables are designed for precise interpolation of altitude for declination only by means ofinterpolation tables which facilitate linear interpolation and provide additionally for the effect of seconddifferences.

    The data are applicable to the solutions of sights of all celestial bodies; there are no limiting values ofaltitude, latitude, hour angle, or declination.

    2. Arrangement. The tables are divided into six volumes, each of which includes two eight-degreezones of latitude. An overlap of 1° occurs between volumes. The six volumes cover latitude bands 0° to15°, 15° to 30°, 30° to 45°, 45° to 60°, 60° to 75°, and 75° to 90°.

    Each consecutive opening of the pages of a latitude zone differs from the preceding one by 1° of localhour angle (LHA). As shown in figures 1 and 2, the values of LHA are prominently displayed at the top andbottom of each page; the horizontal argument heading each column is latitude, and the vertical argument isdeclination.

    For each combination of arguments, the tabulations are: the tabular altitude (ht or Tab. Hc), the altitudedifference (d) with its sign, and the azimuth angle (Z).

    Within each opening, the data on the left-hand page are the altitudes, altitude differences, and azimuthangles of celestial bodies when the latitude of the observer has the same name as the declinations of thebodies. For any LHA tabulated on a left-hand page and any combination of the tabular latitude anddeclination arguments, the tabular altitude and associated azimuth angle respondents on the left-hand pageare those of a body above the celestial horizon of the observer.

    The LHA’s tabulated on the left-hand pages are limited to the following ranges: 0° increasing to 90°and 360° decreasing to 270°. On any left-hand page there are two tabulated LHA’s, one LHA in the range0° increasing to 90° and the second in the range 360° decreasing to 270°.

    On the right-hand page of each opening, the data above the horizontal rules are the tabular altitudes,altitude differences, and azimuth angles of celestial bodies above the celestial horizon when the latitude ofthe observer has a name contrary to the name of the declinations of the bodies and the LHA’s of the bodiesare those tabulated at the top of the page. The data below the horizontal rules are the tabular altitudes,altitude differences, and azimuth angles of celestial bodies above the celestial horizon when the latitude ofthe observer has the same name as the declinations of the bodies and the LHA’s of the bodies are thosetabulated at the bottom of the page.

    The LHA’s tabulated at the top of a right-hand page are the same as those tabulated on the left-handpage of the opening. The LHA’s tabulated at the bottom of the right-hand page are limited to the range 90°increasing to 270°; one of the two LHA’s at the bottom of the page is in the range 90° increasing to 180°;the other LHA is in the range 180° increasing to 270°; the LHA in the range 90° increasing to 180° is thesupplement of the LHA at the top of the page in the range 0° increasing to 90°. When the LHA is 90°, theleft and right-hand pages are identical.

    The horizontal rules, known as the Contrary-Same Line or C-S Line, indicate the degree of declinationin which the celestial horizon occurs.

  • 60°, 300° L.H.A.

    FIGURE1VI

    60°, 300° L.H.A. LATITUDE SAME NAME AS DECLINATION

    L.H.A. greater than 180° .....Zn=ZL.H.A. less than 180°.............Zn=360°–ZLATITUDE SAME NAME AS DECLINATION N. Lat. {

    INTRODUCTION

    45° 46° 47° 48° 49° 50° 51° 52° Dec. Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Dec. ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° 0 20 42.3 + 45.3 112.2 20 19.4 + 46.0 112.6 19 56.3 + 46.6 112.9 19 32.8 + 47.2 113.2 19 09.0 + 47.8 113.5 18 44.8 + 48.5 113.9 18 20.4 + 49.1 114.2 17 55.7 + 49.7 114.5 0 1 21 27.6 + 45.0 111.5 21 05.4 + 45.8 111.9 20 42.9 + 46.4 112.2 20 20.0 + 47.1 112.6 19 56.8 + 47.8 112.9 19 33.3 + 48.4 113.2 19 09.5 + 48.9 113.6 18 45.4 + 49.5 113.9 1 2 22 12.6 + 45.0 110.8 21 51.2 + 45.6 111.2 21 29.3 + 46.3 111.5 21 07.1 + 46.9 111.9 20 44.6 + 47.5 112.3 20 21.7 + 48.2 112.6 19 58.4 + 48.8 112.9 19 34.9 + 49.4 113.3 2 3 22 57.6 + 44.7 110.1 22 36.8 + 45.4 110.5 22 15.6 + 46.1 110.9 21 54.0 + 46.8 111.2 21 32.1 + 47.5 111.6 21 09.9 + 48.0 112.0 20 47.2 + 48.7 112.3 20 24.3 + 49.3 112.7 3 4 23 42.3 + 44.5 109.3 23 22.2 + 45.2 109.8 23 01.7 + 45.9 110.2 22 40.8 + 46.6 110.6 22 19.6 + 47.2 110.9 21 57.9 + 47.9 111.3 21 35.9 + 48.6 111.7 21 13.6 + 49.1 112.1 4 5 24 26.8 + 44.3 108.6 24 07.4 + 45.0 109.0 23 47.6 + 45.7 109.5 23 27.4 + 46.4 109.9 23 06.8 + 47.1 110.3 22 45.8 + 47.8 110.7 22 24.5 + 48.4 111.1 22 02.7 + 49.0 111.4 5 6 25 11.1 + 44.0 107.9 24 52.4 + 44.8 108.3 24 33.3 + 45.6 108.8 24 13.8 + 46.3 109.2 23 53.9 + 46.9 109.6 23 33.6 + 47.6 110.0 23 12.9 + 48.2 110.4 22 51.7 + 48.9 110.8 6 7 25 55.1 + 43.8 107.1 25 37.2 + 44.6 107.6 25 18.9 + 45.3 108.0 25 00.1 + 46.0 108.5 24 40.8 + 46.8 108.9 24 21.2 + 47.4 109.3 24 01.1 + 48.1 109.8 23 40.6 + 48.7 110.2 7 8 26 38.9 + 43.6 106.4 26 21.8 + 44.3 106.8 26 04.2 + 45.1 107.3 25 46.1 + 45.8 107.8 25 27.6 + 46.5 108.2 25 08.6 + 47.2 108.7 24 49.2 + 47.8 109.1 24 29.3 + 48.5 109.5 8 9 27 22.5 + 43.3 105.6 27 06.1 + 44.1 106.1 26 49.3 + 44.8 106.6 26 31.9 + 45.6 107.0 26 14.1 + 46.3 107.5 25 55.8 + 47.0 108.0 25 37.0 + 47.7 108.4 25 17.8 + 48.4 108.9 9 10 28 05.8 + 43.1 104.8 27 50.2 + 43.9 105.3 27 34.1 + 44.7 105.8 27 17.5 + 45.4 106.3 27 00.4 + 46.1 106.8 26 42.8 + 46.8 107.3 26 24.7 + 47.6 107.8 26 06.2 + 48.2 108.2 10 11 28 48.9 + 42.8 104.0 28 34.1 + 43.6 104.5 28 18.8 + 44.3 105.1 28 02.9 + 45.1 105.6 27 46.5 + 45.9 106.1 27 29.6 + 46.7 106.6 27 12.3 + 47.3 107.1 26 54.4 + 48.0 107.6 11 12 29 31.7 + 42.4 103.2 29 17.7 + 43.3 103.8 29 03.1 + 44.1 104.3 28 48.0 + 44.9 104.8 28 32.4 + 45.6 105.4 28 16.3 + 46.3 105.9 27 59.6 + 47.1 106.4 27 42.4 + 47.8 106.9 12 13 30 14.1 + 42.2 102.4 30 01.0 + 43.0 103.0 29 47.2 + 43.8 103.5 29 32.9 + 44.6 104.1 29 18.0 + 45.4 104.6 29 02.6 + 46.2 105.2 28 46.7 + 46.9 105.7 28 30.2 + 47.6 106.2 13 14 30 56.3 + 41.9 101.6 30 44.0 + 42.7 102.2 30 31.0 + 43.6 102.7 30 17.5 + 44.4 103.3 30 03.4 + 45.2 103.9 29 48.8 + 45.9 104.4 29 33.6 + 46.6 105.0 29 17.8 + 47.3 105.5 14 15 31 38.2 + 41.5 100.7 31 26.7 + 42.4 101.3 31 14.6 + 43.2 101.9 31 01.9 + 44.0 102.5 30 48.6 + 44.8 103.1 30 34.7 + 45.6 103.7 30 20.2 + 46.4 104.3 30 05.1 + 47.2 104.8 15 16 32 19.7 + 41.1 99.9 32 09.1 + 42.0 100.5 31 57.8 + 42.9 101.1 31 45.9 + 43.8 101.7 31 33.4 + 44.6 102.3 31 20.3 + 45.4 102.9 31 06.6 + 46.1 103.5 30 52.3 + 46.9 104.1 16 17 33 00.8 + 40.8 99.0 32 51.1 + 41.7 99.7 32 40.7 + 42.6 100.3 32 29.7 + 43.4 100.9 32 18.0 + 44.3 101.5 32 05.7 + 45.1 102.2 31 52.7 + 45.9 102.8 31 39.2 + 46.6 103.4 17 18 33 41.6 + 40.5 98.1 33 32.8 + 41.3 98.8 33 23.3 + 42.2 99.4 33 13.1 + 43.1 100.1 33 02.3 + 43.9 100.7 32 50.8 + 44.8 101.4 32 38.6 + 45.6 102.0 32 25.8 + 46.4 102.6 18 19 34 22.1 + 40.0 97.2 34 14.1 + 41.0 97.9 34 05.5 + 41.9 98.6 33 56.2 + 42.8 99.3 33 46.2 + 43.7 99.9 33 35.6 + 44.4 100.6 33 24.2 + 45.3 101.2 33 12.2 + 46.1 101.9 19 20 35 02.1 + 39.6 96.3 34 55.1 + 40.6 97.0 34 47.4 + 41.5 97.7 34 39.0 + 42.4 98.4 34 29.9 + 43.3 99.1 34 20.0 + 44.2 99.8 34 09.5 + 45.0 100.4 33 58.3 + 45.8 101.1 20 21 35 41.7 + 39.2 95.4 35 35.7 + 40.1 96.1 35 28.9 + 41.1 96.8 35 21.4 + 42.0 97.5 35 13.2 + 42.9 98.2 35 04.2 + 43.8 98.9 34 54.5 + 44.7 99.6 34 44.1 + 45.5 100.3 21 22 36 20.9 + 38.8 94.5 36 15.8 + 39.8 95.2 36 10.0 + 40.7 95.9 36 03.4 + 41.7 96.7 35 56.1 + 42.5 97.4 35 48.0 + 43.5 98.1 35 39.2 + 44.3 98.8 35 29.6 + 45.2 99.5 22 23 36 59.7 + 38.2 93.5 36 55.6 + 39.3 94.3 36 50.7 + 40.3 95.0 36 45.1 + 41.2 95.8 36 38.6 + 42.2 96.5 36 31.5 + 43.0 97.3 36 23.5 + 44.0 98.0 36 14.8 + 44.8 98.7 23 24 37 37.9 + 37.8 92.6 37 34.9 + 38.8 93.3 37 31.0 + 39.8 94.1 37 26.3 + 40.8 94.9 37 20.8 + 41.8 95.6 37 14.5 + 42.7 96.4 37 07.5 + 43.6 97.1 36 59.6 + 44.5 97.9 24 25 38 15.7 + 37.3 91.6 38 13.7 + 38.3 92.4 38 10.8 + 39.4 93.1 38 07.1 + 40.3 93.9 38 02.6 + 41.3 94.7 37 57.2 + 42.3 95.5 37 51.1 + 43.2 96.3 37 44.1 + 44.2 97.0 25 26 38 53.0 + 36.8 90.6 38 52.0 + 37.9 91.4 38 50.2 + 38.8 92.2 38 47.4 + 39.9 93.0 38 43.9 + 40.9 93.8 38 39.5 + 41.9 94.6 38 34.3 + 42.8 95.4 38 28.3 + 43.7 96.2 26 27 39 29.8 + 36.3 89.6 39 29.9 + 37.3 90.4 39 29.0 + 38.4 91.2 39 27.3 + 39.4 92.0 39 24.8 + 40.4 92.8 39 21.4 + 41.4 93.7 39 17.1 + 42.4 94.5 39 12.0 + 43.3 95.3 27 28 40 06.1 + 35.6 88.5 40 07.2 + 36.7 89.4 40 07.4 + 37.8 90.2 40 06.7 + 38.9 91.0 40 05.2 + 39.9 91.9 40 02.8 + 40.9 92.7 39 59.5 + 41.9 93.6 39 55.3 + 42.9 94.4 28 29 40 41.7 + 35.1 87.5 40 43.9 + 36.2 88.3 40 45.2 + 37.3 89.2 40 45.6 + 38.4 90.0 40 45.1 + 39.5 90.9 40 43.7 + 40.5 91.8 40 41.4 + 41.5 92.6 40 38.2 + 42.5 93.5 29 30 41 16.8 + 34.5 86.4 41 20.1 + 35.6 87.3 41 22.5 + 36.7 88.1 41 24.0 + 37.8 89.0 41 24.6 + 38.9 89.9 41 24.2 + 40.0 90.8 41 22.9 + 41.0 91.7 41 20.7 + 42.0 92.5 30 31 41 51.3 + 33.8 85.3 41 55.7 + 35.0 86.2 41 59.2 + 36.2 87.1 42 01.8 + 37.3 88.0 42 03.5 + 38.3 88.9 42 04.2 + 39.4 89.8 42 03.9 + 40.5 90.7 42 02.7 + 41.5 91.6 31 32 42 25.1 + 33.2 84.2 42 30.7 + 34.4 85.1 42 35.4 + 35.5 86.0 42 39.1 + 36.6 86.9 42 41.8 + 37.8 87.8 42 43.6 + 38.9 88.8 42 44.4 + 39.9 89.7 42 44.2 + 41.0 90.6 32 33 42 58.3 + 32.5 83.0 43 05.1 + 33.7 84.0 43 10.9 + 34.8 84.9 43 15.7 + 36.0 85.8 43 19.6 + 37.1 86.8 43 22.5 + 38.2 87.7 43 24.3 + 39.4 88.7 43 25.2 + 40.5 89.6 33 34 43 30.8 + 31.8 81.9 43 38.8 + 32.9 82.8 43 45.7 + 34.2 83.8 43 51.7 + 35.4 84.7 43 56.7 + 36.6 85.7 44 00.7 + 37.7 86.7 44 03.7 + 38.8 87.6 44 05.7 + 39.9 88.6 34 35 44 02.6 + 31.0 80.7 44 11.7 + 32.3 81.7 44 19.9 + 33.5 82.6 44 27.1 + 34.7 83.6 44 33.3 + 35.9 84.6 44 38.4 + 37.1 85.6 44 42.5 + 38.2 86.6 44 45.6 + 39.4 87.5 35 36 44 33.6 + 30.3 79.5 44 44.0 + 31.6 80.5 44 53.4 + 32.8 81.5 45 01.8 + 34.0 82.5 45 09.2 + 35.2 83.5 45 15.5 + 36.4 84.5 45 20.7 + 37.6 85.5 45 25.0 + 38.7 86.5 36 37 45 03.9 + 29.5 78.3 45 15.6 + 30.7 79.3 45 26.2 + 32.0 80.3 45 35.8 + 33.3 81.3 45 44.4 + 34.4 82.3 45 51.9 + 35.7 83.3 45 58.3 + 36.9 84.4 46 03.7 + 38.0 85.4 37 38 45 33.4 + 28.7 77.1 45 46.3 + 30.0 78.1 45 58.2 + 31.2 79.1 46 09.1 + 32.4 80.1 46 18.8 + 33.8 81.1 46 27.6 + 34.9 82.2 46 35.2 + 36.2 83.2 46 41.7 + 37.4 84.3 38 39 46 02.1 + 27.8 75.8 46 16.3 + 29.1 76.8 46 29.4 + 30.5 77.8 46 41.5 + 31.7 78.9 46 52.6 + 33.0 79.9 47 02.5 + 34.3 81.0 47 11.4 + 35.5 82.0 47 19.1 + 36.7 83.1 39 40 46 29.9 + 27.0 74.5 46 45.4 + 28.3 75.5 46 59.9 + 29.5 76.6 47 13.2 + 30.9 77.6 47 25.6 + 32.1 78.7 47 36.8 + 33.4 79.8 47 46.9 + 34.7 80.9 47 55.8 + 36.0 81.9 40 41 46 56.9 + 26.0 73.2 47 13.7 + 27.4 74.3 47 29.4 + 28.7 75.3 47 44.1 + 30.0 76.4 47 57.7 + 31.4 77.4 48 10.2 + 32.6 78.5 48 21.6 + 33.9 79.6 48 31.8 + 35.2 80.7 41 42 47 22.9 + 25.2 71.9 47 41.1 + 26.4 72.9 47 58.1 + 27.8 74.0 48 14.1 + 29.2 75.1 48 29.1 + 30.4 76.2 48 42.8 + 31.8 77.3 48 55.5 + 33.1 78.4 49 07.0 + 34.4 79.5 42 43 47 48.1 + 24.1 70.5 48 07.5 + 25.5 71.6 48 25.9 + 26.9 72.7 48 43.3 + 28.2 73.8 48 59.5 + 29.6 74.9 49 14.6 + 30.9 76.0 49 28.6 + 32.2 77.1 49 41.4 + 33.6 78.3 43 44 48 12.2 + 23.2 69.2 48 33.0 + 24.6 70.2 48 52.8 + 25.9 71.3 49 11.5 + 27.2 72.4 49 29.1 + 28.6 73.5 49 45.5 + 30.0 74.7 50 00.8 + 31.4 75.8 50 15.0 + 32.6 77.0 44 45 48 35.4 + 22.2 67.8 48 57.6 + 23.5 68.9 49 18.7 + 24.9 69.9 49 38.7 + 26.3 71.0 49 57.7 + 27.6 72.2 50 15.5 + 29.0 73.3 50 32.2 + 30.4 74.5 50 47.6 + 31.8 75.6 45 46 48 57.6 + 21.1 66.4 49 21.1 + 22.5 67.4 49 43.6 + 23.9 68.5 50 05.0 + 25.3 69.6 50 25.3 + 26.7 70.8 50 44.5 + 28.1 71.9 51 02.6 + 29.4 73.1 51 19.4 + 30.8 74.3 46 47 49 18.7 + 20.0 65.0 49 43.6 + 21.4 66.0 50 07.5 + 22.8 67.1 50 30.3 + 24.2 68.2 50 52.0 + 25.6 69.4 51 12.6 + 27.0 70.5 51 32.0 + 28.4 71.7 51 50.2 + 29.8 72.9 47 48 49 38.7 + 19.0 63.5 50 05.0 + 20.3 64.6 50 30.3 + 21.7 65.7 50 54.5 + 23.1 66.8 51 17.6 + 24.5 67.9 51 39.6 + 25.9 69.1 52 00.4 + 27.4 70.3 52 20.0 + 28.8 71.5 48 49 49 57.7 + 17.8 62.0 50 25.3 + 19.2 63.1 50 52.0 + 20.6 64.2 51 17.6 + 22.0 65.3 51 42.1 + 23.4 66.5 52 05.5 + 24.8 67.6 52 27.8 + 26.2 68.8 52 48.8 + 27.7 70.1 49 50 50 15.5 + 16.7 60.5 50 44.5 + 18.1 61.6 51 12.6 + 19.4 62.7 51 39.6 + 20.8 63.8 52 05.5 + 22.3 65.0 52 30.3 + 23.7 66.1 52 54.0 + 25.2 67.3 53 16.5 + 26.6 68.6 50 51 50 32.2 + 15.4 59.0 51 02.6 + 16.8 60.1 51 32.0 + 18.2 61.2 52 00.4 + 19.6 62.3 52 27.8 + 21.0 63.4 52 54.0 + 22.5 64.6 53 19.2 + 23.9 65.8 53 43.1 + 25.5 67.1 51 52 50 47.6 + 14.3 57.5 51 19.4 + 15.6 58.6 51 50.2 + 17.0 59.6 52 20.0 + 18.5 60.8 52 48.8 + 19.9 61.9 53 16.5 + 21.3 63.1 53 43.1 + 22.8 64.3 54 08.6 + 24.2 65.5 52 53 51 01.9 + 13.0 56.0 51 35.0 + 14.4 57.0 52 07.2 + 15.8 58.1 52 38.5 + 17.1 59.2 53 08.7 + 18.6 60.3 53 37.8 + 20.1 61.5 54 05.9 + 21.5 62.7 54 32.8 + 23.0 64.0 53 54 51 14.9 + 11.8 54.4 51 49.4 + 13.2 55.4 52 23.0 + 14.5 56.5 52 55.6 + 15.9 57.6 53 27.3 + 17.3 58.7 53 57.9 + 18.7 59.9 54 27.4 + 20.2 61.1 54 55.8 + 21.7 62.4 54 55 51 26.7 + 10.6 52.8 52 02.6 + 11.8 53.9 52 37.5 + 13.2 54.9 53 11.5 + 14.6 56.0 53 44.6 + 16.0 57.1 54 16.6 + 17.5 58.3 54 47.6 + 18.9 59.5 55 17.5 + 20.4 60.7 55 56 51 37.3 + 9.2 51.3 52 14.4 + 10.5 52.3 52 50.7 + 11.9 53.3 53 26.1 + 13.2 54.4 54 00.6 + 14.6 55.5 54 34.1 + 16.0 56.7 55 06.5 + 17.6 57.8 55 37.9 + 19.0 59.1 56 57 51 46.5 + 7.9 49.7 52 24.9 + 9.3 50.7 53 02.6 + 10.5 51.7 53 39.3 + 11.9 52.7 54 15.2 + 13.3 53.8 54 50.1 + 14.7 55.0 55 24.1 + 16.1 56.2 55 56.9 + 17.6 57.4 57 58 51 54.4 + 6.7 48.1 52 34.2 + 7.9 49.0 53 13.1 + 9.2 50.0 53 51.2 + 10.5 51.1 54 28.5 + 11.8 52.2 55 04.8 + 13.3 53.3 55 40.2 + 14.7 54.5 56 14.5 + 16.2 55.7 58 59 52 01.1 + 5.3 46.4 52 42.1 + 6.5 47.4 53 22.3 + 7.8 48.4 54 01.7 + 9.1 49.4 54 40.3 + 10.5 50.5 55 18.1 + 11.8 51.6 55 54.9 + 13.2 52.7 56 30.7 + 14.7 53.9 59 60 52 06.4 + 3.9 44.8 52 48.6 + 5.1 45.8 53 30.1 + 6.4 46.7 54 10.8 + 7.7 47.7 54 50.8 + 9.0 48.8 55 29.9 + 10.4 49.9 56 08.1 + 11.8 51.0 56 45.4 + 13.2 52.2 60 61 52 10.3 + 2.6 43.2 52 53.7 + 3.8 44.1 53 36.5 + 5.0 45.0 54 18.5 + 6.2 46.0 54 59.8 + 7.5 47.0 55 40.3 + 8.8 48.1 56 19.9 + 10.2 49.2 56 58.6 + 11.6 50.4 61 62 52 12.9 + 1.3 41.6 52 57.5 + 2.4 42.4 53 41.5 + 3.5 43.4 54 24.7 + 4.8 44.3 55 07.3 + 6.1 45.3 55 49.1 + 7.4 46.4 56 30.1 + 8.7 47.4 57 10.2 + 10.1 48.6 62 63 52 14.2 – 0.1 39.9 52 59.9 + 1.0 40.8 53 45.0 + 2.2 41.7 54 29.5 + 3.4 42.6 55 13.4 + 4.5 43.6 55 56.5 + 5.8 44.6 56 38.8 + 7.1 45.7 57 20.3 + 8.5 46.8 63 64 52 14.1 – 1.4 38.3 53 00.9 – 0.4 39.1 53 47.2 + 0.7 40.0 54 32.9 + 1.8 40.9 55 17.9 + 3.0 41.8 56 02.3 + 4.2 42.8 56 45.9 + 5.6 43.8 57 28.8 + 6.9 44.9 64 65 52 12.7 – 2.8 36.7 53 00.5 – 1.7 37.5 53 47.9 – 0.7 38.3 54 34.7 + 0.4 39.2 55 20.9 + 1.6 40.1 56 06.5 + 2.7 41.0 56 51.5 + 3.9 42.0 57 35.7 + 5.2 43.1 65 66 52 09.9 – 4.1 35.0 52 58.8 – 3.2 35.8 53 47.2 – 2.1 36.6 54 35.1 – 1.1 37.4 55 22.5 0.0 38.3 56 09.2 + 1.2 39.2 56 55.4 + 2.4 40.2 57 40.9 + 3.6 41.2 66 67 52 05.8 – 5.5 33.4 52 55.6 – 4.5 34.1 53 45.1 – 3.6 34.9 54 34.0 – 2.5 35.7 55 22.5 – 1.5 36.6 56 10.4 – 0.4 37.4 56 57.8 + 0.7 38.4 57 44.5 + 1.9 39.3 67 68 52 00.3 – 6.8 31.8 52 51.1 – 5.9 32.5 53 41.5 – 5.0 33.2 54 31.5 – 4.1 34.0 55 21.0 – 3.0 34.8 56 10.0 – 2.0 35.6 56 58.5 – 0.9 36.5 57 46.4 + 0.3 37.5 68 69 51 53.5 – 8.1 30.2 52 45.2 – 7.3 30.8 53 36.5 – 6.4 31.5 54 27.4 – 5.4 32.3 55 18.0 – 4.6 33.0 56 08.0 – 3.5 33.8 56 57.6 – 2.5 34.7 57 46.7 – 1.4 35.6 69 70 51 45.4 – 9.4 28.6 52 37.9 – 8.6 29.2 53 30.1 – 7.8 29.9 54 22.0 – 7.0 30.6 55 13.4 – 6.0 31.3 56 04.5 – 5.1 32.1 56 55.1 – 4.1 32.9 57 45.3 – 3.1 33.7 70 71 51 36.0 – 10.7 27.0 52 29.3 – 10.0 27.6 53 22.3 – 9.1 28.2 54 15.0 – 8.3 28.9 55 07.4 – 7.5 29.5 55 59.4 – 6.6 30.3 56 51.0 – 5.6 31.0 57 42.2 – 4.7 31.9 71 72 51 25.3 – 12.0 25.4 52 19.3 – 11.2 26.0 53 13.2 – 10.6 26.5 54 06.7 – 9.8 27.2 54 59.9 – 9.0 27.8 55 52.8 – 8.1 28.5 56 45.4 – 7.3 29.2 57 37.5 – 6.3 30.0 72 73 51 13.3 – 13.2 23.8 52 08.1 – 12.6 24.4 53 02.6 – 11.8 24.9 53 56.9 – 11.1 25.5 54 50.9 – 10.4 26.1 55 44.7 – 9.7 26.7 56 38.1 – 8.8 27.4 57 31.2 – 8.0 28.1 73 74 51 00.1 – 14.4 22.3 51 55.5 – 13.8 22.8 52 50.8 – 13.2 23.3 53 45.8 – 12.6 23.8 54 40.5 – 11.8 24.4 55 35.0 – 11.1 25.0 56 29.3 – 10.4 25.6 57 23.2 – 9.5 26.3 74 75 50 45.7 – 15.6 20.8 51 41.7 – 15.1 21.2 52 37.6 – 14.5 21.7 53 33.2 – 13.9 22.2 54 28.7 – 13.3 22.7 55 23.9 – 12.5 23.2 56 18.9 – 11.8 23.8 57 13.7 – 11.1 24.5 75 76 50 30.1 – 16.9 19.2 51 26.6 – 16.3 19.6 52 23.1 – 15.8 20.1 53 19.3 – 15.2 20.5 54 15.4 – 14.6 21.0 55 11.4 – 14.1 21.5 56 07.1 – 13.4 22.1 57 02.6 – 12.7 22.7 76 77 50 13.2 – 17.9 17.7 51 10.3 – 17.5 18.1 52 07.3 – 17.0 18.5 53 04.1 – 16.5 18.9 54 00.8 – 16.0 19.4 54 57.3 – 15.4 19.8 55 53.7 – 14.8 20.3 56 49.9 – 14.2 20.9 77 78 49 55.3 – 19.1 16.2 50 52.8 – 18.6 16.6 51 50.3 – 18.2 16.9 52 47.6 – 17.7 17.3 53 44.8 – 17.2 17.7 54 41.9 – 16.8 18.2 55 38.9 – 16.3 18.6 56 35.7 – 15.7 19.1 78 79 49 36.2 – 20.2 14.8 50 34.2 – 19.8 15.1 51 32.1 – 19.4 15.4 52 29.9 – 19.0 15.7 53 27.6 – 18.6 16.1 54 25.1 – 18.1 16.5 55 22.6 – 17.6 16.9 56 20.0 – 17.2 17.3 79 80 49 16.0 – 21.2 13.3 50 14.4 – 21.0 13.6 51 12.7 – 20.6 13.9 52 10.9 – 20.3 14.2 53 09.0 – 19.8 14.5 54 07.0 – 19.4 14.9 55 05.0 – 19.0 15.2 56 02.8 – 18.6 15.6 80 81 48 54.8 – 22.3 11.9 49 53.4 – 22.0 12.1 50 52.1 – 21.7 12.4 51 50.6 – 21.3 12.7 52 49.2 – 21.1 13.0 53 47.6 – 20.7 13.3 54 46.0 – 20.4 13.6 55 44.2 – 19.9 13.9 81 82 48 32.5 – 23.3 10.5 49 31.4 – 23.0 10.7 50 30.4 – 22.8 10.9 51 29.3 – 22.6 11.2 52 28.1 – 22.2 11.4 53 26.9 – 21.9 11.7 54 25.6 – 21.6 12.0 55 24.3 – 21.3 12.3 82 83 48 09.2 – 24.3 9.1 49 08.4 – 24.1 9.3 50 07.6 – 23.9 9.5 51 06.7 – 23.6 9.7 52 05.9 – 23.4 9.9 53 05.0 – 23.2 10.1 54 04.0 – 22.9 10.4 55 03.0 – 22.6 10.6 83 84 47 44.9 – 25.3 7.7 48 44.3 – 25.1 7.9 49 43.7 – 24.9 8.1 50 43.1 – 24.7 8.2 51 42.5 – 24.5 8.4 52 41.8 – 24.3 8.6 53 41.1 – 24.0 8.8 54 40.4 – 23.8 9.0 84 85 47 19.6 – 26.2 6.4 48 19.2 – 26.0 6.5 49 18.8 – 25.9 6.6 50 18.4 – 25.7 6.8 51 18.0 – 25.6 6.9 52 17.5 – 25.4 7.1 53 17.1 – 25.3 7.3 54 16.6 – 25.1 7.4 85 86 46 53.4 – 27.1 5.1 47 53.2 – 27.0 5.2 48 52.9 – 26.8 5.3 49 52.7 – 26.8 5.4 50 52.4 – 26.6 5.5 51 52.1 – 26.5 5.6 52 51.8 – 26.3 5.7 53 51.5 – 26.2 5.9 86 87 46 26.3 – 27.9 3.8 47 26.2 – 27.9 3.8 48 26.1 – 27.8 3.9 49 25.9 – 27.7 4.0 50 25.8 – 27.7 4.1 51 25.6 – 27.5 4.2 52 25.5 – 27.5 4.3 53 25.3 – 27.4 4.4 87 88 45 58.4 – 28.8 2.5 46 58.3 – 28.7 2.5 47 58.3 – 28.7 2.6 48 58.2 – 28.6 2.6 49 58.1 – 28.6 2.7 50 58.1 – 28.6 2.8 51 58.0 – 28.5 2.8 52 57.9 – 28.4 2.9 88 89 45 29.6 – 29.6 1.2 46 29.6 – 29.6 1.3 47 29.6 – 29.6 1.3 48 29.6 – 29.6 1.3 49 29.5 – 29.5 1.3 50 29.5 – 29.5 1.4 51 29.5 – 29.5 1.4 52 29.5 – 29.5 1.4 89

    90 45 00.0 – 30.4 0.0 46 00.0 – 30.4 0.0 47 00.0 – 30.4 0.0 48 00.0 – 30.4 0.0 49 00.0 – 30.4 0.0 50 00.0 – 30.5 0.0 51 00.0 – 30.5 0.0 52 00.0 – 30.5 0.0 90

    45° 46° 47° 48° 49° 50° 51° 52°

  • L.H.A. 60°, 300°

    L.H.A. 120°, 240°LATITUDE SAME NAME AS DECLINATIONL.H.A. greater than 180° ....Zn=180°–ZL.H.A. less than 180°............Zn=180°+Z

    LATITUDE CONTRARY NAME TO DECLINATION

    S. Lat. {

    A. DESCRIPTION OF TABLES

    FIGURE2VII

    45° 46° 47° 48° 49° 50° 51° 52° Dec. Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Hc d Z Dec. ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° ′ ′ ° ° 0 20 42.3 – 45.5 112.2 20 19.4 – 46.1 112.6 19 56.3 – 46.8 112.9 19 32.8 – 47.4 113.2 19 09.0 – 48.0 113.5 18 44.8 – 48.6 113.9 18 20.4 – 49.2 114.2 17 55.7 – 49.7 114.5 0 1 19 56.8 – 45.6 112.9 19 33.3 – 46.2 113.2 19 09.5 – 46.9 113.6 18 45.4 – 47.5 113.9 18 21.0 – 48.2 114.2 17 56.2 – 48.7 114.5 17 31.2 – 49.3 114.8 17 06.0 – 49.9 115.0 1 2 19 11.2 – 45.7 113.6 18 47.1 – 46.4 113.9 18 22.6 – 47.0 114.2 17 57.9 – 47.7 114.5 17 32.8 – 48.2 114.8 17 07.5 – 48.8 115.1 16 41.9 – 49.3 115.4 16 16.1 – 49.9 115.6 2 3 18 25.5 – 45.9 114.3 18 00.7 – 46.6 114.6 17 35.6 – 47.2 114.9 17 10.2 – 47.7 115.2 16 44.6 – 48.4 115.4 16 18.7 – 48.9 115.7 15 52.6 – 49.5 116.0 15 26.2 – 50.0 116.2 3 4 17 39.6 – 46.0 115.0 17 14.1 – 46.6 115.2 16 48.4 – 47.2 115.5 16 22.5 – 47.9 115.8 15 56.2 – 48.4 116.0 15 29.8 – 49.1 116.3 15 03.1 – 49.6 116.5 14 36.2 – 50.2 116.8 4 5 16 53.6 – 46.2 115.6 16 27.5 – 46.8 115.9 16 01.2 – 47.4 116.2 15 34.6 – 48.0 116.4 15 07.8 – 48.6 116.7 14 40.7 – 49.1 116.9 14 13.5 – 49.7 117.1 13 46.0 – 50.1 117.3 5 6 16 07.4 – 46.3 116.3 15 40.7 – 46.9 116.5 15 13.8 – 47.5 116.8 14 46.6 – 48.1 117.0 14 19.2 – 48.6 117.3 13 51.6 – 49.2 117.5 13 23.8 – 49.7 117.7 12 55.9 – 50.3 117.9 6 7 15 21.1 – 46.4 117.0 14 53.8 – 47.0 117.2 14 26.3 – 47.6 117.4 13 58.5 – 48.1 117.7 13 30.6 – 48.8 117.9 13 02.4 – 49.2 118.1 12 34.1 – 49.8 118.3 12 05.6 – 50.3 118.5 7 8 14 34.7 – 46.5 117.6 14 06.8 – 47.1 117.8 13 38.7 – 47.7 118.1 13 10.4 – 48.3 118.3 12 41.8 – 48.8 118.5 12 13.2 – 49.4 118.7 11 44.3 – 49.9 118.8 11 15.3 – 50.4 119.0 8 9 13 48.2 – 46.6 118.3 13 19.7 – 47.2 118.5 12 51.0 – 47.8 118.7 12 22.1 – 48.3 118.9 11 53.0 – 48.9 119.1 11 23.8 – 49.4 119.2 10 54.4 – 49.9 119.4 10 24.9 – 50.5 119.6 9 10 13 01.6 – 46.7 118.9 12 32.5 – 47.3 119.1 12 03.2 – 47.9 119.3 11 33.8 – 48.5 119.5 11 04.1 – 48.9 119.7 10 34.4 – 49.5 119.8 10 04.5 – 50.0 120.0 9 34.4 – 50.5 120.1 10 11 12 14.9 – 46.9 119.6 11 45.2 – 47.4 119.7 11 15.3 – 47.9 119.9 10 45.3 – 48.4 120.1 10 15.2 – 49.0 120.2 9 44.9 – 49.5 120.4 9 14.5 – 50.1 120.5 8 43.9 – 50.5 120.7 11 12 11 28.0 – 46.8 120.2 10 57.8 – 47.5 120.4 10 27.4 – 48.0 120.5 9 56.9 – 48.6 120.7 9 26.2 – 49.1 120.8 8 55.4 – 49.6 121.0 8 24.4 – 50.1 121.1 7 53.4 – 50.6 121.2 12 13 10 41.2 – 47.0 120.8 10 10.3 – 47.5 121.0 9 39.4 – 48.1 121.1 9 08.3 – 48.6 121.3 8 37.1 – 49.1 121.4 8 05.8 – 49.7 121.5 7 34.3 – 50.1 121.7 7 02.8 – 50.6 121.8 13 14 9 54.2 – 47.0 121.5 9 22.8 – 47.6 121.6 8 51.3 – 48.1 121.7 8 19.7 – 48.7 121.9 7 48.0 – 49.2 122.0 7 16.1 – 49.7 122.1 6 44.2 – 50.2 122.2 6 12.2 – 50.7 122.3 14 15 9 07.2 – 47.1 122.1 8 35.2 – 47.6 122.2 8 03.2 – 48.2 122.3 7 31.0 – 48.7 122.5 6 58.8 – 49.2 122.6 6 26.4 – 49.7 122.7 5 54.0 – 50.2 122.8 5 21.5 – 50.7 122.8 15 16 8 20.1 – 47.2 122.7 7 47.6 – 47.7 122.8 7 15.0 – 48.2 122.9 6 42.3 – 48.7 123.0 6 09.6 – 49.3 123.1 5 36.7 – 49.7 123.2 5 03.8 – 50.2 123.3 4 30.8 – 50.7 123.4 16 17 7 32.9 – 47.2 123.3 6 59.9 – 47.8 123.4 6 26.8 – 48.3 123.5 5 53.6 – 48.8 123.6 5 20.3 – 49.3 123.7 4 47.0 – 49.8 123.8 4 13.6 – 50.3 123.9 3 40.1 – 50.7 123.9 17 18 6 45.7 – 47.3 124.0 6 12.1 – 47.7 124.1 5 38.5 – 48.3 124.1 5 04.8 – 48.8 124.2 4 31.0 – 49.3 124.3 3 57.2 – 49.8 124.4 3 23.3 – 50.3 124.4 2 49.4 – 50.7 124.4 18 19 5 58.4 – 47.2 124.6 5 24.4 – 47.9 124.7 4 50.2 – 48