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The Military Auxiliary Radio System (MARS) is a United States Department of Defense sponsored program, established as a separately managed and operated program by the United States Army and the United States Air Force. The United States Navy-Marine Corps program closed in 2015.
The primary HFGCS voice frequencies are 4724.0 kHz, 8992.0 kHz, 11175.0 kHz, and 15016.0 kHz. In addition to the HFGCS, U.S. aircraft frequently use Military Auxiliary Radio System (MARS) HF stations (13927.0 kHz) and Canadian Forces HF stations (11232.0 kHz) to relay messages. Various other discrete frequencies are available, and used, as part ...
Compass Sail Clockwise radio frequency receiving CW launch warning system: AN/APR-44: Radar Warning Receiver (RWR) AN/APR-46: Wideband microwave receiving systems [92] MC-130E Combat Talon I, MC-130H Combat Talon II, AC-130H Spectre: AN/APR-47: Electronic Support Measures (ESM) system: F-4G Wild Weasel V: AN/APR-48: Radar Frequency ...
Besides broadcast messages, Coast Guard stations handle direct traffic between aircraft, cutters, boats, and shore stations on VHF, MF, and HF frequencies, including the HF Data Link encrypted e-mail system and Digital Selective Calling (DSC), which uses radio telephone to send digitally encrypted signals to either one receiver or a group or ...
The Navy adopted modified versions of the Western Electric units as the R-28/ARC-5 receiver and T-23/ARC-5 transmitter. The T-126/ARC-5 is a late variant of the T-23 which allowed the four channels to be grouped in a 100 to 146 MHz tuning range, smaller than the T-23's.
FLTSATCOM (also FLTSAT) is a satellite communication system controlled by the U.S. Space Force (formally SPAWARSYSCOM) which was used for UHF radio communications between ships, submarines, airplanes and ground stations of the Navy. [1]
The frequencies, channels, and some of their purposes are governed by the ITU. For an authoritative list see. [ 8 ] The original allocation of channels consisted of only channels 1 to 28 with 50 kHz spacing between channels, and the second frequency for full-duplex operation 4.6 MHz higher.
Frequency management is evaluated as one of the main points for communications planning. In a coalition force, where there are a huge number of countries and military forces, if there is not correct management and coordination of spectrum bands what is colloquially called “frequency fratricide” will happen.