Navigation and Seamanship

4.1.13. Rules

Rule 27 – Vessels not under command or restricted in their ability to manoeuvre.

Rule 28 – Vessels constrained by their draught

Rule 29 - Pilot vessels

Rule 30 – Anchored vessels and vessels aground

Rule 31 – Seaplanes

Part D – Sound and light signals

Rule 32 – Definitions

a. The word “whistle” means any sound signalling appliance capable of producing the prescribed blasts and which complies with the specification – frequency lic within the range of 70-700 Hz.

b. Short blast – means a blast of about one second’s duration

c. Prolonged blast – blast of from four to six seconds duration

Rule 33 – Equipments for sound signals

Rule 34 – Manoeuvring and warning signals

Rule 35 – Sound signals in restricted visibility

Rule 36 – Signals to attract attention

Rule 37 – Distress signals