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QuizQ & A

Junior NavigationJunior NavigationChapter 8Chapter 8

Plotting Celestial Plotting Celestial LOPsLOPs

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1. You are on a true course of 130° at a speed of 6.0 knots. At ZT 0715, your DR position is L 30°20.0'N, Lo 73°05.0'W. At 0715 you take a sight on the sun. Later at ZT 1115 you take a second sight on the sun. You reduce the sights and obtain the following data:

ZT 0715: a = 3.0 mi T, Zn = 121°; andZT 1115: a = 3.0 mi A, Zn = 172°. Plot and label the LOPs, advance your ZT 0715 LOP to the time of your ZT 1115 sight, and determine the following from your plot:

Latitude Longitude

a. 1115 DR position: __________ ___________

b. 1115 RFix: __________ ___________

L 30°04.6’ N Lo 72°43.8’ W

L 30° 08.4’ N Lo 72°37.4'W

Rounded to L 30°05’ N Lo 72°44’ W

Rounded to L 30° 08’ N Lo 72°37'W

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Quiz Problem 8 - 1

R Fix: L 30° 08'N Lo72° 37'W

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2. You are at a known position at L 29°47.0'N, Lo 72°56.5'W. You take a run of sights on the lower limb of the sun for your JN Sight Folder. Reducing the ZT 1017 sight provides you with: a = 4.7 mi T & Zn = 137°

a. Plot and label the LOP and determine the coordinates of your EP

_______________________

b. Is this an acceptable sight for your sight folder? ___

c. Why? ______________________

Yes

Intercept is less than 5 nm

L 29° 43.6'N Lo 72° 52.8'WRounded to L 29° 44’N Lo 72°53'W

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EP: L 29° 44'N Lo72° 53'W

1017

Quiz Problem 8 - 2

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Q7Q7

End OfEnd Of Quiz Q & A Quiz Q & A

Junior NavigationJunior NavigationChapter 8Chapter 8

Plotting Celestial Plotting Celestial LOPsLOPs