Sail Skills - ColRegs Free Guide to ColRegs (the International Regulations for Preventing Collisions at Sea, the IRPCS or Collision Regs).  Guidance covers all aspects with animations, pictures and diagrams.  Aimed at small vessel users but suitable for professional mariners.  Especially recommended for RYA examination candidates.
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ColRegs Home>ColRegs>Lights & Shapes>Not Under Command Rule 27 Vessels Not Under Command  A vessel not under command shall exhibit where they can best be seen two:  balls (or similar shape) red all-round lights  in a vertical line A merchant vessel showing the signals for a vessel not under command back to top and  when making way:  sidelights sternlight These signals:  are not distress signals and need not be  exhibited by vessels less than 12m
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