Article 3.30 - Distress signals

1. When a vessel in distress needs assistance, it may display:

(a) A flag or any other suitable object waved in a circle;

(b) A light waved in a circle;

(c) A flag having above or below it a ball or anything resembling a ball;

(d) Rockets or shells throwing red stars, fired one at a time at short intervals;

(e) A luminous signal consisting of the group ... --- ... (S0S) in Morse Code;

(f) Flames such as may be produced by burning tar, oil, etc.;

(g) Parachute flares or hand held flares emitting a red light;

(h) Slow, repeated up and down movements of the arms extended on each side.

2. These signals replace or supplement the sound signals referred to in article 4.04.