1. Need of Assistance The following signals, used or exhibited either together or separately, indicate distress and need of assistance:(a) a gun or other explosive signal fired at intervals of about a minute;(b) a continuous sounding with any fog-signalling apparatus;(c) rockets or shells, throwing red stars fired one at a time at short intervals;(d) a signal made by any signalling method consisting of the group ... --- ... (SOS) in the Morse Code;(e) a signal sent by radiotelephony consisting of the spoken word "Mayday";(f) the International Code Signal of distress … [Read more...]
ANNEX III – Technical Details of Sound Signal Appliances
1. Whistles (a) Frequencies and range audibility The fundamental frequency of the signal shall lie within the range 70-700Hz. The range of audibility of the signal from a whistle shall be determined by those frequencies, which may include the fundamental and/or one or more higher frequencies, which lie within the range 180-700Hz (+/-1%) for a vessel of 20 meters or more in length, or 180-2100Hz (+/-1%) for a vessel of less than 20 meters in length and which provide the sound pressure levels specified in paragraph 1(c) below.The range of audibility of the signal from a whistle shall be … [Read more...]
ANNEX II – Additional Signals for Fishing Vessels Fishing in Close Proximity
ANNEX II Additional Signals for Fishing Vessels Fishing in Close Proximity 1. General The lights mentioned herein shall, if exhibited in pursuance of Rule 26(d), be placed where they can best be seen. They shall be at least 0.9 meters apart but at a lower level than lights prescribed in Rule 26(b)(i) and (c)(i). The lights shall be visible all around the horizon at a distance of at least 1 mile but at a lesser distance than the lights prescribed by these Rules for fishing vessels. 2. Signals for trawlers (a) Vessels engaged in trawling, whether using demersal or pelagic gear, may … [Read more...]
Annex I – Positioning and technical details of lights and shapes
1. Definition The term “height above the hull” means height above the uppermost continuous deck. This height shall be measured from the position vertically beneath the location of the light. 2. Vertical positioning and spacing of lights On a power-driven vessel of 20 metres or more in length the masthead lights shall be placed as follows: The forward masthead light, or if only one masthead light is carried, then that light, at a height above the hull of not less than 6 metres, and, if the breadth of the vessel exceeds 6 metres, then at a height above the hull not less … [Read more...]