priyom.org

United Kingdom

The Defence High Frequency Communications Service (DHFCS) provides HF services to various parts of the British military. The DHFCS uses six pairs of ground stations, all of which are remotely controlled from the Forest Moor and Kinloss receiver sites:

Location Type
UK (North) Crimond Transmitter
Kinloss Receiver
UK (Middle) Inskip Transmitter
Forest Moor Receiver
UK (South) St. Eval Transmitter
Penhale Sands Receiver
Cyprus Salt Lake Transmitter
Episkopi Receiver
Ascension Island Donkey Plain Transmitter
Airhead Receiver
Falkland Islands Bush Rincon Transmitter
Mocho Pond Receiver

Unless noted otherwise, all frequencies mentioned on this page are on the upper sideband.

Voice

The Royal Air Force aircraft use the following frequencies for clear voice traffic. The network control station uses the callsign Tascomm.

  • 3146
  • 4742
  • 6733
  • 9031
  • 11205
  • 13257
  • 15031
  • 18018

Data

The DHFCS provides two-way data services using 2G ALE and MIL-STD-188-110B. The ALE IDs used are as follows:

  • XSS: Network control station
  • X__: Mobile stations, such as Royal Navy ships and Royal Air Force aircraft (except AWACS)
  • UKE30#: AWACS aircraft

The following is a non-exhaustive list of frequencies used for data services, and the ground stations they are associated with. Not all of them are active at the same time; a frequency is considered active only if there is an ALE sounding from XSS every 30 minutes.

  • 2216 - Inskip, UK
  • 2451.5 - St. Eval, UK
  • 2784 - Inskip, UK
  • 3086 - St. Eval, UK
  • 3640 - St. Eval, UK
  • 4047.5 - Inskip, UK
  • 4239.5 - St. Eval, UK
  • 4347.5 - Inskip, UK
  • 4510 - Inskip, UK
  • 4706 - St. Eval, UK
  • 4845 - Inskip, UK
  • 5295 - Inskip, UK
  • 5466 - Inskip, UK
  • 5808 - Inskip, UK
  • 6234.5 - Cyprus
  • 6239 - Cyprus
  • 6251 - St. Eval, UK
  • 6416.5 - Inskip, UK
  • 6462 - Inskip, UK
  • 6706 - Inskip, UK
  • 6845 - Cyprus
  • 6873.5 - Inskip, UK
  • 6992 - Inskip, UK
  • 7535 - Cyprus
  • 7567.5 - St. Eval, UK
  • 7860 - Inskip, UK
  • 8107 - Cyprus
  • 8125 - Falkland Islands
  • 8161 - Inskip, UK
  • 8167 - Inskip, UK
  • 8182 - Inskip, UK
  • 8478.5 - Cyprus
  • 8532.5 - St. Eval, UK
  • 8773 - Inskip, UK
  • 9019 - St. Eval, UK
  • 9286 - St. Eval, UK
  • 9905 - Inskip, UK
  • 10344.5 - Cyprus
  • 10351 - Inskip, UK
  • 10410 - St. Eval, UK
  • 10420 - Falkland Islands
  • 10836 - Cyprus
  • 10893.5 - Inskip, UK
  • 11208 - Cyprus
  • 11550 - Inskip, UK
  • 12230 - Cyprus
  • 12245 - Inskip, UK
  • 12313 - St. Eval, UK
  • 12752.5 - Inskip, UK
  • 13423.5 - St. Eval, UK
  • 13552 - Cyprus
  • 13877 - St. Eval, UK
  • 14485.5 - Cyprus
  • 14509 - Inskip, UK
  • 14555 - Inskip, UK
  • 14875 - Cyprus
  • 14968 - St. Eval, UK
  • 16148 - Cyprus
  • 16321 - Inskip, UK
  • 16357 - Cyprus
  • 16910.5 - Inskip, UK
  • 18210 - Inskip, UK
  • 18403.5 - Cyprus
  • 18875 - Cyprus
  • 20168 - Inskip, UK
  • 20423.5 - Cyprus
  • 22177 - Inskip, UK
  • 22571 - Cyprus

Secure broadcasts

The DHFCS ground stations carry continuous STANAG 4285 broadcasts. The 600L ones are single KW-46 encrypted streams, while the 1200L ones use time-division multiplexing to carry up to 12 KW-46 encrypted channels.

The frequencies are often changed, so the following list might not always be 100% up to date.

UK (various sites)

Frequency Settings Notes
2115 600L Nighttime
2169.7 600L  
2191.2 600L  
2423.2 1200L Nighttime
2560.5 1200L Nighttime
2766 1200L Nighttime
2813.3 1200L  
3140 1200L Nighttime
3287.3 1200L  
3303 600L Nighttime
3333 600L Nighttime
3353 1200L Nighttime
3368.2 600L  
3384.2 600L  
3803.2 1200L Nighttime

UK (various sites) - continued

Frequency Settings Notes
4163.3 1200L  
4263.2 600L  
4314.2 600L Daytime
4361.4 600L Daytime
4419.6 1200L Daytime
4686 1200L Daytime
6335.2 600L  
6412.7 600L Daytime
6786 1200L Daytime
7681 1200L Daytime, sporadic
7937 1200L Daytime, sporadic
8003 1200L Daytime, sporadic
8074 1200L Daytime, sporadic
8612.2 600L Daytime

Cyprus

Frequency Settings Notes
6805.2 1200L Nighttime
7579.2 1200L Nighttime
8548 1200L  
12323.2 1200L Daytime, sporadic
14548.2 1200L Daytime
15812.1 1200L Daytime
19051.7 1200L Daytime

Ascension Island

Frequency Settings Notes
14390 1200L Usually nighttime
16287 1200L Usually nighttime
20918 1200L Usually daytime
22186 1200L Usually daytime

Additionally, the Flag Officer Sea Training (Royal Navy) makes sporadic KG-84 encrypted 75Bd/850Hz FSK broadcasts using the Inskip and St. Eval transmitter sites, simultaneously on the following frequencies:

  • 2813
  • 4730
  • 6757
  • 8986
  • 11211