JP 3-50 National Search and Rescue Manual Vol I - US Navy

(6) Organization requesting DF assistance.
The net usually continues alert status for aircraft
forced to ditch, or crash land, to obtain bearings on
emergency radio beacons or crash position indicator (CPI)
radio beacons. The net control station de-alerts the net
automatically when the emergency is over.
F. The Federal Communications Commission (FCC) operates a 400 kHz
to 40 MHz Direction-Finding Net that covers the inland United States,
the Pacific Ocean and the Atlantic Ocean. A Watch Office in Washington
D.C. monitors MF, HF, and VHF distress calls 24 hours a day. The FCC
also operates field offices with personnel who can locate ELTs and
EPIRBs using mobile and portable DF equipment. FCC services should be
used for urgent SAR only and are generally not available to the public.
1. SMCs may activate the net by calling the FCC Watch Officer at
202-632-6975, or the nearest FCC office during normal business
hours, and providing the same information needed to alert the
FAA net. SMCs should ensure the FCC net is de-alerted as soon
as possible after the distressed unit is located.
2. The FCC net provides an elliptical area containing the most
probable location of the distress and the longitude and
latitude of the ellipse's center. While the net usually does
not provide DF bearings with a fix, SMCs should request all
available bearings.
G. The National Transportation Safety Board (NTSB) based on the
requirement to rapidly locate recorded radar data in conjunction with
accident/incident investigations, developed a computer program
containing a database of all U.S. Civilian (FAA), U.S. Military, and
Canadian (civil) ground based radars capable of providing recorded radar
data.
The program, known as RADARFIND (RADF), provides the user with a
listing of all radar sites with
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