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>Attract Attention back to top It’s interesting to note that offshore installations such as oil rigs in the North Sea often use code U as both a: - light signal to indicate position and - fog signal Here a danger is being indicated. U is sent by lamp and sound before a searchlight is used:
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“You are running into danger” (click on button to listen) Morse U MP3.mp3