HF Aeronautical Frequencies
HO = Service available to meet operational requirements
NAT Family A: Used by all aircraft flying the Southern NAT Routes. Assigned to aircraft flying routes with reporting coordinates between 43° North and 47° North.
Ground Stations: Gander, New York, Santa Marie, Shanwick
3016.0 kHz 0100-0900 and 1800-2200 UTC
5598.0 kHz H24
8906.0 kHz 0900-2100 UTC
13306.0 kHz HO
NAT Family B: Assigned to aircraft flying routes with reporting coordinates between 47° North and 64° North. Ground Stations: Gander, Iceland, Shanwick
2899.0 kHz 0000-0900 and 1800-2400 UTC
5616.0 kHz H24
8864.0 kHz 0900-2100 UTC
13291.0 kHz HO
17946.0 kHz HO
NAT Family C: Assigned to aircraft flying routes with reporting coordinates between 47° North and 64° North. Ground Stations: Gander, Iceland, Shanwick
2872.0 kHz 0000-0900 and 1800-2400 UTC
5649.0 kHz H24
8879.0 kHz 0900-2100 UTC
11336.0 kHz HO
13306.0 kHz HO
17946.0 kHz HO
NAT Family D: Assigned to aircraft flying routes with reporting coordinates north of 62° North. Ground Stations: Bodo, Gander, Iceland, Shanwick, Arctic Radio (not a NAT station)
2971.0 kHz 0100-0800 UTC
4675.0 kHz 0100-0800 and 1100-1800 UTC
8891.0 kHz HO
11279.0 kHz HO
17946.0 kHz HO
NAT Family E: Assigned on a tactical basis and coordinated between New York Radio and Santa Marie Radio.
2962.0 kHz 0100-0800 UTC
6628.0 kHz 0000-1900 UTC
8825.0 kHz 0000-1900 and 2300-2400 UTC
11309.0 kHz 0900-1900 UTC
13354.0 kHz 1100-1900 UTC
17946.0 kHz HO
NAT Family F: Assigned on a tactical basis and coordinated between Shanwick Radio and Gander Radio.
3476.0 kHz 0100-0800 UTC
6622.0 kHz 1000-1800 UTC
8831.0 kHz 1000-1800 UTC
13291.0 kHz HO
17946.0 kHz HO
Starting April 22, 2013, the following additional Regional and Domestic Air Route Area (RDARA) HF frequencies (NAT H/I/J) will be used on a tactical basis by Shanwick Radio, adjoining NARTEL (North Atlantic Enroute HF RTL Network) Radio Stations and domestic ATC agencies. These frequencies are used individually or by common network agreement between the NAT aeronautical stations.
NAT Family H: Used on a tactical basis and coordinated between Shanwick Radio, adjoining NARTEL Radio Stations and domestic ATC agencies.
2965.0 kHz HO
3491.0 kHz HO
5583.0 kHz HO
6556.0 kHz HO
6667.0 kHz HO
10021.0 kHz HO
10036.0 kHz HO
11363.0 kHz HO
NAT Family I: Used on a tactical basis and coordinated between Shanwick Radio,
adjoining NARTEL Radio Stations and domestic ATC agencies.
2860.0 kHz HO
2881.0 kHz HO
2890.0 kHz HO
3458.0 kHz HO
3473.0 kHz HO
3488.0 kHz HO
5484.0 kHz HO
5568.0 kHz HO
6550.0 kHz HO
6595.0 kHz HO
10066.0 kHz HO
NAT Family J: Used on a tactical basis and coordinated between Shanwick Radio, adjoining NARTEL Radio Stations and domestic ATC agencies.
2869.0 kHz HO
2944.0 kHz HO
2992.0 kHz HO
3446.0 kHz HO
3473.0 kHz HO
4651.0 kHz HO
4666.0 kHz HO
4684.0 kHz HO
5460.0 kHz HO
5481.0 kHz HO
5559.0 kHz HO
5577.0 kHz HO
6547.0 kHz HO
8954.0 kHz HO
11276.0 kHz HO
After April 22, 2013, the historical practice of assigning aircraft registered west of 30° west HF Family 'B' frequencies and east of 30° west HF Family 'C' frequencies, no longer applies. NAT HF Family 'B' and 'C' frequencies are assigned to aircraft flying routes with reporting co-ordinates between 47° North and 64° North.
Search and Rescue (SAR) - Operated as required
2182.0 kHz HO
3023.0 kHz HO
5680.0 kHz HO
Hours of service of individual frequencies, or groups of frequencies, may vary as HF propagation conditions or operational requirements demand.
VHF Aircraft Frequencies
123.450 MHz H24 - VHF air to air frequency enables aircraft engaged in flights over remote and oceanic areas, out of range of VHF ground stations, to exchange necessary operational information and to facilitate the resolution of operational problems.
122.375 MHz - Gander
123.950 MHz H24 - For use by aircraft registered in States west of 030° West for requesting Oceanic clearance direct from OAC.
124.175 MHz H24
126.550 MHz - Reykjavik
126.900 MHz - Churchill, Gander, Goose, Iqaluit, Montreal/Pierre Elliott Trudeau, Winnipeg
127.100 MHz - Gander
127.650 MHz H24 - For use by aircraft registered in States east of 030° West for requesting Oceanic clearance direct from OAC. For this purpose Australia is regarded as being east of 030° West.
127.850 MHz - Reykjavik
127.900 MHz H24 - Gander, Santa Marie, Shanwick. Used when practicable by aircraft when east of 020° West to reduce loading on HF channels. Traffic received on this frequency is handled in exactly the same way as if received on HF.
129.900 MHz - New York
SATCOM
425002 - A/G Shanwick Radio H24 Irish Aviation Authority. Available for routine ATS messages via Shanwick Radio.
423201 - ATC Shanwick Oceanic H24 NATS Ltd. Available for direct pilot/controller communications in emergency situations only
436623 - ATC New York Atlantic Flights H24
436625 - ATC San Francisco Pacific Flights H24