The snubber is a length of nylon or polyester three-strand line that takes the anchor load from the chain to a deck cleat or Samson post, absorbing the shocks and leaving the chain hanging in a loose bight, resting lightly and relatively noiselessly in the bow roller.
The snubber is attached to the chain by a chain hook of some sort – there are a range of proprietary variations available – or a rolling hitch. After a few months, we dispensed with our clunky chain hook in favour of the rolling hitch – we found this more positive than the chain hook and more deck and toe friendly. The rolling hitch is particularly suited to this purpose, it doesn’t tighten under load and so won’t jam and become difficult to undo.
The snubber for a 35 to 40-foot cruising boat would be typically 12mm diameter and at least 12m long. If you choose a line that’s too heavy you won’t get enough of the beneficial stretch into the system, which is why old halyards and sheets aren’t really suitable for this purpose, they tend to be low stretch. The snubber is attached to the chain and a strong point on deck and then the chain is run out until the snubber comes up taught, then a few more feet to give a nice healthy loop of chain and you’re set. If the snubber chafes through the chain retakes the load.
A snubber is also useful in anchorages where the swell comes from a different direction to the wind, curving around a headland, perhaps. The boat, lying to the wind, may take the swell on the beam and roll uncomfortably. In this case, lead the snubber line all the way aft to a cleat or sheet-winch on the side away from the swell. Then, as you let out more anchor chain, the boat will turn her head toward the swell as the anchor lead point moves aft. This bridle arrangement can mean a good night’s sleep in an otherwise impossibly rolly anchorage.
An essential thing is the snubber.