How to tie a fender to the lifeline: knots and alternatives

Tying a fender looks trivial — until the day you find yours drifting between two pontoons, or wedged under your neighbour’s rubbing strake. How you attach it makes all the difference, for your hull and for the time each manoeuvre takes.

The classic: round turn and two half hitches

It’s the knot taught in every sailing course, and it remains the safe choice: a full turn around the lifeline, then two half hitches snugged against the turn. Done properly, it holds firmly and unties without a fight, even after taking load.

Its limits show up in daily use: you must retie it every time the height changes. High quay, floating pontoon, lock, rafting up — each situation means untying, adjusting, retying. With six fenders, you repeat the operation at every stop.

The clove hitch: fast but debated

The clove hitch (two crossed loops over the lifeline) is quicker to tie and adjust. It is also the most debated: under the vibration and repeated jolts of a fender working against a quay, it can slip — especially on smooth wire with a stiff or wet line. Plenty of sailors use it, but rarely for a long, unattended stay.

The mistakes that cost you a scratched hull

An overlong tail badly coiled, dragging on deck or in the water.
A “good enough” knot tied in a hurry mid-manoeuvre — precisely the one that slips at 3 a.m.

Dedicated hangers: adjust without retying

A cleat-based fender hanger removes the knot entirely: the body attaches to the lifeline, the fender line runs through a self-locking cam cleat, and the height adjusts by pulling or easing — one-handed, in two seconds. The harder the fender pulls, the harder the cleat grips.

That is exactly what FENDLOCK does: it clips onto any 4–8 mm lifeline (stainless or textile), its engineering polymer won’t scratch the wire or its sleeve, and feeding the line back through the hanger’s body locks everything — the fender stays aboard even after a botched manoeuvre.

Summary

Method	Speed	Height adjustment	Reliability
Round turn + two half hitches	Average	Retie every time	Excellent
Clove hitch	Good	Retie every time	Average
Cleat hanger (FENDLOCK)	Excellent	Continuous, 2 s	Excellent

Knots remain a skill worth mastering — they’ll save you on a chartered or borrowed boat. On your own boat, a dedicated hanger turns the chore into a flick of the wrist.