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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back to top ColRegs Home>ColRegs>Lights & Shapes>Note:  Submarines Note: Submarines  The regulations do not require a submarine to exhibit a special light  Most exhibit a yellow flashing light at night (and every one I’ve seen in UK waters - except those blacked out) A Royal Navy Submarine
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