Maritime Distress Signals

Transmitting a spoken voice Mayday/Pan Pan message by radio over very high-frequency channel 16 (156.8 MHz) and/or high frequency on 2182 kHz

Transmitting a digital distress signal by activating (or pressing) the distress button (or key) on a marine radio equipped with Digital Selective Calling (DSC) over the VHF (channel 70)

Sending the Morse code group SOS ( 3 short – 3 Long – 3 short ) by light flashes or sounds

Square flag with ball shape above or below

EPIRB Activation Emergency Position Indication Radio Beacon 406MHZ ( Satellite distress signal)

Distress flares: smoke, handheld, parachute, Burning a red flare (either hand-held or aerial parachute flare) Emitting orange smoke from a canister

Raising and lowering slowly and repeatedly both arms outstretched to each side

Making a continuous sound with any fog-signalling apparatus

Flying the November and Charlie Flags

Gun or other explosive signals, fired at intervals of about a minute.

Controlled Fire

Distress signals at a glance