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>Manoeuvring & Warn>View Obscured in Narrow Channel or Fairway Rule 34 Manoeuvring and Warning Signals View Obscured in a Narrow Channel or Fairway  Vessel nearing:  bend or area of a narrow: channel fairway  where other vessels may be obscured by obstruction: back to top A vessel within hearing that is:  approaching the bend or behind the obstruction  shall answer with the same signal   There is no provision in the ColRegs for these sound signals to be supplemented by a light signal (which wouldn’t be seen!) Vessel approaching bend or area of channel or fairway where other vessels may be obscured Note that these sound signals are required to be made by any vessel  - not just power-driven ones Diagram of a vessel approaching a bend where the view is obscured Diagram of vessels manoeuvring in sight of each other Diagram of one vessel overtaking another A Royal Navy warship with a small motor boat closing - risk of collision exists Power-driven altering course and astern Concern at another vessel Overtaking in narrow channel or fairway View obscured in narrow channel or fairway
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