The AN/MRN-3 was a marker beacon set used by the Army Air Force during and after World War II, it was standardized 23 October 1943, and replaced SCR-241. In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/MRN-3" designation represents the 3rd design of an Army-Navy electronic device for ground mobile radio navigational aid.
The AN/MRN-3 was a marker beacon set used by the Army Air Force during and after World War II, it was standardized 23 October 1943, and replaced SCR-241. In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/MRN-3" designation represents the 3rd design of an Army-Navy electronic device for ground mobile radio navigational aid.
Source: Wikipedia "AN/MRN-3" · CC BY-SA 4.0
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