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.
Every penny helps!
Boating Books
Annex II Fishing in Close Proximity Trawling  Animation:  making way nets have come fast ColRegs Home>ColRegs>Lights & Shapes>Animations>Fishing>Fishing in Proximity - Trawling - Nets Come Fast Vessel fishing in close proximity based on vessel under 50m making way nets have come fast back to top of vessels engaged in trawling in proximity Fish in proximity - purse seining Vessels in proximity engaged in purse seining Fish in proximity - trawling Vessels in proximity engaged in trawling Fishing other than trawling A vessel engaged in fishing "other than trawling" Trawling A vessel engaged in trawling