Fenders Preventing Hull Damage

Posted on Tuesday 31st March 2015 00:10 by Hurricane Fenders

Fenders are bumpers used to absorb the kinetic energy of a boat or vessel berthing against a quay, jetty, wall or other vessel and are an essential piece of equipment for any boat to protect the hull from damage.

Fenders are either extruded or are moulded in one piece and the type of fender that is most suitable for an application depends on many variables, including dimensions and displacement of the vessel, maximum allowable stand-off, berthing structure, tidal variations and other berth-specific conditions. The primary fender sizing considerations when purchasing fenders are boat weight, boat length and mooring conditions.

As marine fenders protect your sail boat from contact with whatever it is lying alongside they are usually concentrated around the maximum beam and not spaced along the hull at even intervals.

Cylindrical double eye fenders are typically hung vertically when mooring against docks or other flat structures with the general rule of thumb being that a cylindrical fender should have 1" of diameter (2" for round fenders) for every 4ft to 5ft of boat length and may be hung horizontally with two fender lines. Fenders are usually hung horizontally to fend against protruding structures such as pilings and to prevent any roll-off. 

Consider using at least four marine fenders when lying alongside structures. It may also be useful to consider having some spare fenders for when another boat berths alongside with an insufficient amount of protective fenders.

Boats are expensive but fenders are not and having the correct type, quantity and size of fenders on board will give ultimate protection whilst docking.