Zing
Well-Known Member
I have a very heavy boat and have found only a small benefit in comfort or reduced anchor load. I always use a snubber though as it does help and I size it so it protects the windlass from load. I don’t have a chain stopper, but ought to have one I think - very hard to fit. A claw would be good too. Currently am using a dyneema loop on a pelican hook instead. Not as tidy.
I was on a 180 ton boat yesterday. No snubber and they anchor out a lot.
I can guess as to why the need for a snubber is less on big boats as it may be down to the way load on the anchor arises. Load is caused by wind, by waves and and a change of direction from sailing at anchor. For a given wind speed the maximum wind load on an anchor will be proportional to the superstructure cross sectional area, which will increase with the square of boat length. The dynamic loads from waves and swing will be proportional to the displacement of the boat, which increases with the cube of length. So the bigger the boat, the less important dynamic load is. So a 2 ton catamaran jerks and swings like crazy in big winds and waves, but a supertanker hardly moves.
I was on a 180 ton boat yesterday. No snubber and they anchor out a lot.
I can guess as to why the need for a snubber is less on big boats as it may be down to the way load on the anchor arises. Load is caused by wind, by waves and and a change of direction from sailing at anchor. For a given wind speed the maximum wind load on an anchor will be proportional to the superstructure cross sectional area, which will increase with the square of boat length. The dynamic loads from waves and swing will be proportional to the displacement of the boat, which increases with the cube of length. So the bigger the boat, the less important dynamic load is. So a 2 ton catamaran jerks and swings like crazy in big winds and waves, but a supertanker hardly moves.

