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>Sail and Oars>Sailing Vessels Under Sail & Power Rule 25 Sailing Vessel Underway Under Sail & Power  A sailing vessel:  “proceeding under sail” and “propelled by machinery”  Shall exhibit forward where it can best be seen:  a conical shape, point downwards back to top Of course, a sailing vessel is power-driven if “propelling machinery” is used, and must exhibit the lights for a power-driven vessel  Masthead lights in particular can often be obscured by (fore)sails A sailing vessel under sail and power - displaying a cone, point downwards Vessels under sail and power Vessels under oars A small boat under oars Sailing vessels under 7m A sailing vessel (a dinghy) under 7m Sailing vessels under 20m A sailing vessel (a sloop) under 20m Sailing vessels optional lights A large vessel under sail showing optional lights on her mast Sailing vessels general A large vessel under sail
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Large sailing vessel under sail and power, exhibiting a cone point downwards