AN/MRN-3

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.

Use

Each system requires three marker beacon sets, one to be located in the airport runway boundary, one at approximately one mile from the approach end of the runway, and one 4.5 miles from the approach end of the runway, all on the center line of the runway to be used. The equipment transmits a vertical pattern to be received by the RC-43, RC-193, or AN/ARN-8, AN/ARN-12. A signal, amplitude modulated at 1,300 cycles per second, may be keyed at two dashes per second, six dots per second, or may be unkeyed. The marker beacon transmitter projects a vertical fan-shaped pattern to a height of approximately 3,000 feet. The transmitter is placed so that the longer horizontal axis is perpendicular to the line of approach.

Components

The beacon set is mounted in a jeep (Willys MB) and consists of

Aircraft components

See also

References

    External links

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