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Sound signals in narrow channel or fairway to indicate intention to overtake another vessel on her port side

  • Description of scenario: Vessel A: Vessel about to be overtaken
    Vessel B: Vessel intending to overtake another vessel
    Area: Narrow channel of fairway
    Vessels are in sight of one another
  • Rule(s) to be applied: Rule 34 (Manoeuvring and warning signals)
    Rule 9 (Narrow Channels )
  • Applying the Rule(s) and comments: In accordance with Rule 34 (c)(i) (Manoeuvring and warning signals), when in sight of one another in a narrow channel or fairway a vessel intending to overtake (vessel B) another vessel (vessel A) on her port side shall in compliance with Rule 9 (e)(i) (Narrow Channels ) indicate her intention by two prolonged blasts followed by two short blasts on her whistle.
    In accordance with Rule 34 (c)(ii) (Manoeuvring and warning signals), the vessel about to be overtaken (vessel A) when acting in accordance with Rule 9 (e)(i) (Narrow Channels ) shall indicate her agreement by one prolonged, one short, one prolonged and one short blast on her whistle, in that order.
    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 intending to overtake another vessel on her port side
  • Signals: Sound signal of the vessel about to be overtaken indicating her agreement

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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.