2182.0 kHz—International distress standard voice
2187.5 kHz—International distress digital selective calling
3023.0 kHz—Search and rescue
4125.0 kHz—Distress and safety
4207.5 kHz—International distress digital selective calling
4209.5 kHz—NAVTEX (safety)
5680.0 kHz—Search and rescue
6215.0 kHz—Search and rescue
6312.0 kHz—International distress digital selective calling
8291.0 kHz—Distress and safety
8414.5 kHz—International distress digital selective calling
12290.0 kHz—Distress and safety
12577.0 kHz—International distress digital selective calling
16420.0 kHz—Distress and safety
16804.5 kHz—International distress digital selective calling
121.500 MHz—Aeronautical distress (Civilian Aero Band)
123.100 MHz—Aeronautical search and rescue (Civilian Aero Band)
156.525 MHz—International distress digital selective calling (Marine Band)
156.800 MHz—International hailing and distress (Marine Band)
157.100 MHz—United States (US) maritime working frequency (Marine Band)
243.000 MHz—US/North Atlantic Treaty Organization military aeronautical distress (Military Aero Band)
406.000 MHz—International emergency distress beacon
9200–9500 MHz—Search and rescue transponders