A+ A A-

A vessel engaged in mine clearance operations underway - shapes

  • Description of scenario: Type of vessel: Vessel engaged in mine clearance operations of more than 50 m in length underway
    Time of the day: Daytime
  • Rule(s) to be applied: Rule 27 (Vessels not under command or restricted in their ability to manoeuvre)
  • Applying the Rule(s) and comments: In accordance with Rule 27 (f) (Vessels not under command or restricted in their ability to manoeuvre), a vessel engaged in mine clearance operations shall exhibit three balls. One of these shapes shall be exhibited near the foremast head and one at each end of the fore yard. These shapes indicate that it is dangerous for another vessel to approach within 1000 m of the mine clearance vessel.

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.