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>Signals A prolonged blast followed by a short blast Comparison of whistles back to top These lengths look rather like this: Royal Fleet Auxiliary - length overall 204m Coaster - length overall 75m Royal Fleet Auxiliary: Length 204m Coaster: Length 75m Power-driven vessel underway in restricted visibility Fog Signals Diagram of vessels manoeuvring in sight of each other Manoeuvring & Warn A vessel using a searchlight to indicate a danger Attract Attention
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