Signals to attract attention
In plain language
If necessary to attract the attention of another vessel, any light or sound signal that cannot be mistaken for a prescribed signal may be used, or a searchlight directed towards the danger — but not so as to embarrass any vessel.
Full text of Rule 36
If necessary to attract the attention of another vessel any vessel may make light or sound signals that cannot be mistaken for any signal authorized elsewhere in these Rules, or may direct the beam of her searchlight in the direction of the danger, in such a way as not to embarrass any vessel. Any light to attract the attention of another vessel shall be such that it cannot be mistaken for any aid to navigation. For the purpose of this Rule the use of high intensity intermittent or revolving lights, such as strobe lights, shall be avoided.
Reproduced from the COLREGs 1972 (as amended) for study. Always verify against the official IMO publication.
Key points
- 1
The signal must not be mistakable for any signal in these Rules.
- 2
A searchlight may be directed in the direction of the danger.
- 3
High-intensity flashing or revolving lights are to be avoided.