- When a vessel is in distress and requires assistance from other vessels or from shore, the following shall be the signals to be used or displayed by her either together or separately.(1)a continuous sounding of any sound signal apparatus.(2)A flag or a light waved in a circle to draw attention.(3)Flares on the deck.(4)"May day" transmitted by radio telephony.(5)International code of signal N.C. hoisted on the vessel.
