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>Lights & Shapes>Towing and Pushing>Power-Driven Vessel Towing back to top A large towing vessel (USN) from port (2 masthead lights forward for tow not more than 200m) and a smaller tug from the starboard quarter showing towing and sternlight Image with Permission: Defense Visual Information Center A towing vessel showing the signal (diamond) and the 3 masthead lights for tow over 200m A large towing vessel (USN) from port showing the signal (diamond) and the 3 masthead lights forward for tow over 200m As well as the 3 masthead lights forward to indicate the length of the tow, this vessel exhibits another masthead light abaft and higher than these Remember a vessel under 50m may exhibit this masthead light (it would be to rare to do so) Image with Permission: Defense Visual Information Center Towing vessel under 50m - tow exceeds 200m A towing vessel (under 50m) A tug (under 50m) towing a large vessell A vessel towing two barges alongside A tug (under 50m) towing an inconspicuous object A small motor boat towing a dismasted yacht Towing Tow alongside or push Vessel or object towed Inconspicuous objects towed Special circumstances Towing Vessel Under 50m Need not exhibit the second masthead light above - but may do so Towing vessels less than 50m are the most common These vessels are less than 50m in length
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