A+ A A-

Sound signals when other vessel may be obscured by an intervening obstruction

  • Description of scenario: Area: Near a bend or an area of a channel or a fairway where other vessel may be obscured by an intervening obstruction
  • Rule(s) to be applied: Rule 34 (Manoeuvring and warning signals)
  • Applying the Rule(s) and comments: In accordance with Rule 34 (e) (Manoeuvring and warning signals), a vessel nearing a bend or an area of the channel of fairway where other vessels may be obscured by an intervening obstruction shall sound one prolonged blast. Such signal shall be answered with a prolonged blast by any approaching vessel that may be within hearing around the bend or behind the intervening obstruction.
    In accordance with Rule 34 (f) (Manoeuvring and warning signals), if whistles are fitted on a vessel at a distance apart of more than 100 m, one whistle only shall be used for giving manoeuvring and warning signals.
  • Signals: Sound signal of a vessel nearing a bend or an area of a channel or fairway where other vessels may be obscured by an intervening obstruction
  • Signals: Answer by any approaching vessel that may be within hearing around the bend or behind the intervening obstruction

Advanced COLREGs Course - Visit our advanced course for complex multi-rule and multi-ship scenarios!








This project has been funded with support from the European Commission.This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.