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 ColRegs Home>ColRegs>Lights & Shapes back to top A Royal Navy submarine operating on the surface Lights’ ranges:  are surprisingly short and fall off rapidly with heel or list   Don’t rely on being seen at long range if you are in a small boat, well heeled in a heavy sea! A Royal Navy Submarine
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