8/18/2019 Domet Stanice

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12   24 FEB 06

 © JEPPE SEN SANDERSON, INC. 2 006. ALL RIGHTS RESERVED.

GENERAL INFORMATION

RADIO AIDS

117.975 - 137.0 MHz

AIR TRAFFIC CONTROL

OPERATIONS

The minimum separation between assignable fre-quencies in the aeronautical mobile (R) service shallbe 8.33 kHz.

It is recognized that in some regions or areas, 100kHz, 50 kHz or 25 kHz channel spacing provides anadequate number of frequencies suitably related tointernational and national air services and thatequipment designed specifically for 100 kHz, 50 kHzor 25 kHz channel spacing will remain adequate forservices operating within such regions or areas. It isfurther recognized that assignments based on 25kHz channel spacing as well as 8.33 kHz channelspacing may continue to co-exist within one regionor area.

EFFECTIVE RANGE OF RADIO

TRANSMISSION

The range of VHF transmissions is normally about7% more than an actual line of sight, and can be de-termined by the formula:

118 - 121.4 MHzinclusive

International and NationalAeronautical Mobile

Services

121.5 MHz 121.5 MHz

121.6 - 121.9917MHz inclusive

International and NationalAerodrome SurfaceCommunications

122 - 123.05 MHzinclusive

National AeronauticalMobile Services

123.1 MHz Auxiliary frequency SAR

123.15 - 123.6917

MHz inclusive

National Aeronautical

Mobile Services with theexception of 123.45 MHz.

123.45 MH z Worldwide air-to-aircommunications

123.7 - 129.6917MHz inclusive

International and NationalAeronautical MobileServices

129.7 - 130.8917MHz

National AeronauticalMobile Services

130.9 - 136.875 MHz

inclusive

International and National

Aeronautical MobileServices

136.9 - 136.975 MHzinclusive

International and NationalAeronautical MobileServices

Reserved for VHFair-ground data linkcommunications.

Where:

D = distance in nautical miles;

h = height of the aircraft station aboveearth;

K = (corresponding to an effective earth’sradius of 4/3 of the actual radius);

= 2.22 when h is expressed in metres;and

= 1.23 when h is expressed in feet.