Page History

...

1. When visibility conditions so require, the visual signals prescribed for use at night shall also be displayed by day.

2. Sketches of the signals prescribed in this chapter are contained in annex 3 to these regulations.

...

(a) The term “masthead light” means a strong white light projecting an uninterrupted beam throughout a horizontal arc of 225º and placed so as to project that beam from the bow to 22º30’ abaft the beam on each side;

(b) The term “side lights” means a bright green light to starboard and a bright red light to port, each of these lights projecting an uninterrupted beam throughout a horizontal arc of 112º30’ and placed so as to project that beam from the bow to 22º30’ abaft the beam on its side;

(c) The If not prescribed otherwise, the term “stern light” means an ordinary or bright white light projecting an uninterrupted beam throughout a horizontal arc of 135º and placed so as to project this beam throughout an arc of 67º30’ along each side from the stern;

...

(e) The term “height” means the height above the level of the maximum draught marks or, for vessels without draught marks, above the waterline.

4. When passing through the opening of a fixed or closed bridge or weir, or when passing through locks, vessels may carry the lights, boards, balls, etc. provided for in this chapter at a reduced height so that passage may be effected without difficulty.