Frequency Bands and Frequency Allocation for Air Navigation and Communication

According to propagation characteristics of frequencies are divided into following bands:

VLF Very Low Frequency 0 – 30 kHz
LF Low Frequency 30 kHz – 300 kHz
MF Medium Frequency 300 kHz – 3 MHz
HF High Frequency 3 MHz – 30 MHz
VHF Very High Frequency 30 MHz – 300 MHz
UHF Ultra High Frequency 300 MHz – 3 GHz
SHF Super High Frequency 3 GHz – 30 GHz
EHF Extremely High Frequency 30 GHz – 300 GHz

Note: 200 MHz – 3 GHz is considered UHF in aviation.

Navigation Aids

190 – 535 kHz Non-directional Radio Beacon (low power) and Radio Range (low power)
190 – 1750 kHz Non-directional Beacon
Non-directional Beacon Marker Beacon
108.0 – 117.975 MHz VOR test facility (VOT)
108.0 – 111.975 MHz ILS localizer (on odd-tenths plus twentieth frequencies, 108.1, 108.3, 108.5 etc)
108.0 – 111.975 MHz VOR (even tenths or even tenths plus a twentieth of MHz)
111.975 – 117.975 MHz VOR (even and odd tenths of MHz)
328.6 – 335.4 MHz ILS glide slope
960.0 – 1215.0 MHz DME and TACAN
1563.42 – 1587.42 MHz GPS

 

Air Traffic Control Operations

Minimum separation between assignable frequencies in aeronautical mobile (R) service shall be 8.33 kHz. 100kHz, 50kHz or 25kHz channel spacing remain adequate for services operating and instruments.

118 – 121.4 MHz inclusive International and National Aeronautical Mobile Services
121.5 MHz Emergency Frequency
121.6 – 121.9917 MHz inclusive International and National Aerodrome Surface Communications
122 – 123.05 MHz inclusive National Aeronautical Mobile Services
123.1 MHz Auxiliary Frequency SAR
123.15 – 123.6917 MHz inclusive National Aeronautical Mobile Services with the exception of 123.45 MHz
123.45 MHz Worldwide air to air communications
123.7 – 129.6917 MHz inclusive International and National Aeronautical Mobile Services
129.7 – 130.8917 MHz National Aeronautical Mobile Services
130.9 – 136.875 MHz inclusive International and National Aeronautical Mobile Services
136.9 – 136.975 MHz inclusive International and National Aeronautical Mobile Services
Reserved for VHF air-ground data link communications

 

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