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>Lights General>Arcs of Lights Rule 21 Lights Arcs   Arcs of lights may be shown: back to top Diagram:  plan of a vessel showing arcs of lights Diagram:  Plan of a vessel showing arcs of lights Arcs of Lights Diagram:  lights of a power-driven vessel underway seen through binoculars Range of Lights Lights - power-driven vessel underway from ahead Lights General
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