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>Steer & Sail Rules>Note:  What does 22.5° Look Like? Keep pointing abeam - but now point with the other hand to where you were just facing (the quarter).  You’ll now be looking at about 22.5° abaft the beam Some people do this exercise from their usual steering or look-out positions - then make a note of the angle against a fitting - such as a stanchion  Another rough and ready way - the clenched fist at arm’s length is roughly 10° - so double it Two vessels being overtaken - only sternlight is visible Two vessels being overtaken - only the sternlight is visible In daylight it can be hard to judge: But vessels under:  7m and: power-driven with a design speed less than 7kts or under sail or oars may not display sidelights Three small vessels that do not always display sidelights Three small vessels that do not always display sidelights Determining where 22.5° abaft the beam is (1) Determining where 22.5° abaft the beam is (2) Determining 22.5° abaft the beam - stage 1 Three small vessels that do not always display sidelights Determining 22.5° abaft the beam - stage 2 Three small vessels that do not always display sidelights A clenched fist at arm's length is about 10° A clenched fist at arm’s length is about 10°
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