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>Shapes Shapes Are black and made up of three basic components used in combination: cylinder ball cone back to top These diagrams show the shapes correctly proportioned and with the minimum spacing permitted Shape for a vessel at anchor Shapes for a vessel not under command Shapes for a vessel aground Shape to indicate gear extending more than 150m from a vessel engaged in fishing other than trawling Shape for a vessel engaged in fishing Shape for a vessel towing or towed - length of tow more than 200m Shape for a vessel constrained by her draught Shapes for a vessel restricted in her ability to manoeuvre Cylinder Vessel constrained by her draught Ball Vessel at anchor except vessel: engaged in fishing, or restricted in ability to manoeuvre, engaged in underwater operations where an obstruction exists (these vessels display only their appropriate shapes even when at anchor) Two balls in a vertical line Vessel not under command Three balls in a vertical line Vessel aground Cone, point upward Gear extends more than 150m from a vessel engaged in fishing other than trawling Two cones, points together Vessel engaged in fishing (whether or not underway) Diamond (two cones, together) Vessel towed and towing where length of tow is more than 200m (also used to mark inconspicuous objects towed) Ball Diamond Ball Vessel restricted in her ability to manoeuvre Vessel restricted in her ability to manoeuvre, engaged in dredging or underwater operations where an obstruction exists (whether or not underway). Diamonds indicate side on which to pass Shapes for a vessel engaged in dredging or underwater operations where an obstruction exists Diamond Diamond Ball Diamond Ball Ball Ball Shape for a vessel propelled by sail and machinery Cone, point downward Vessel propelled by sail and machinery Shapes for a vessel engaged in mine clearance operations Vessel engaged in mine clearance operations Ball Ball Ball
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