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Crossing situation (relative bearing PORT 070°) - stand-on vessel is making 360° turn to starboard

  • Description of scenario: Vessel A: Power-driven vessel
    Vessel B: Power-driven vessel
    Area: On the high seas
    Visibility: Good (Vessels in sight of one another)
    Vessel A and vessel B are crossing so as to involve risk of collision
    Vessel B has vessel A on her own port side (relative bearing PORT 070°)
    Vessel A which is required to keep out of the way is not taking appropriate action in compliance with these Rules
    Vessel B which is the stand-on vessel is making a 360° turn to starboard to avoid collision
  • Rule(s) to be applied: Rule 15 (Crossing situation)
    Rule 17 (Action by stand-on vessel)
  • Applying the Rule(s) and comments: In accordance with Rule 15 (Crossing situation), when two power-driven vessels are crossing so as to involve risk of collision, the vessel (vessel A) which has the other (vessel B) on her own starboard side shall keep out of the way.
    In accordance with Rule 15 (Crossing situation), vessel A shall, if the circumstances of the case admit, avoid crossing ahead of the vessel B.
    In accordance with Rule 17 (a)(ii) (Action by stand-on vessel), the vessel which shall keep her course and speed (vessel B) may take action to avoid collision by her manoeuvre alone, as soon as it becomes apparent to her that the vessel required to keep out of the way (vessel A) is not taking appropriate action in compliance with these Rules.
    In accordance with Rule 17 (b) (Action by stand-on vessel), when from any cause, the vessel required to keep her course and speed (vessel B) finds herself so close that collision cannot be avoided by the action of the give-way vessel alone (vessel A), she (vessel B) shall take such action as will best aid to avoid collision.
    In accordance with Rule 17 (c) (Action by stand-on vessel), a power-driven vessel which takes action (vessel B) in a crossing situation in accordance with Rule 17 (a)(ii) to avoid collision with another power-driven vessel (vessel A) shall, if the circumstances of the case admit, not alter course to port for a vessel on her own port side.
    In accordance with Rule 17 (d) (Action by stand-on vessel), Rule 17 does not relieve the give-way vessel (vessel A) of her obligation to keep out of the way.

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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.