A DoD Phone Patch Service
MARSRADIO is currently listed in the Flight Information Publication as of April 2016 under MARS Phone Patch Net.

                    Providing RadioTelephone Service to US Military Aircraft Worldwide​​

​The Military Auxiliary Radio System (MARS) is a United States Department of Defense sponsored program, established as a  US Air Force MARS managed program operated by Army and Air Force MARS volunteer members. MARS is a civilian auxiliary consisting primarily of licensed amateur radio operators who are interested in assisting the military with communications on a local, national and international basis as an adjunct to HF Global and other normal communications.  In November 2017 the MARS Phone Patch Net was replaced with MARSRADIO Network.

Net coverage is global when propagation conditions are favorable.
MARSRADIO provides HF Radio Telephone Service to all US Military,  Coast Guard, Dept. of Homeland Security Aircraft and Allied Forces.  The net is authorized 24 / 7 / 365 by  Amateur Radio volunteers who are members of the Air Force or Army MARS program.  For information see OPERATION .

Operators handle many calls including:

Reporting Takeoff Time

Estimated Time Of Arrival

Status Reports

Radio Checks (Voice)
​Contact Operations

Medical Situations


Diversion Requests

Selective Call (SELCAL)
​Range Scheduling

Tanker Coordination

Orderwire Coordination

Maintenance Issues

Morale Calls
The net has Selective Call (SELCAL) capabilities for contacting aircraft internationally or within CONUS.  Operation would need to be pre-arraigned or the aircraft would need to monitor the primary frequency in SELCAL mode.   For more infomation see ​​​ OPERATION.

Net operation frequencies will be provided to DOD personnel to upon request or refer to the FLIP. Use the contact form to get further information or questions. MARSRADIO does not normally set up a schedule, but if you let us know that you might need our assistance around a certain time use Contact US to let us know and we will try to have station(s) available.  

The authorization to get on MARSRADIO is with the aircraft.  Members of the Armed Forces flying commercial aircraft are not authorized to use the phone patch net.  The net is available for phone patch radio checks and aircrew training in the use of the net.