I moored my two trimarans in mean low tide of 12 inches and never had a problem. At times the multihull
will dance around but it is much lighter than the monohull
and the stress on lines is far less than on a monohull
A big blow came in one night and stayed for about 30 hours. It was a constant 50 mph for that timeframe. It was not an issue of weight or windage. Lines were the responsibility of the boat owner and those many that failed were because of poor seamanship. Every year I replaced my mooring lines and those in the field that did never had a problem, except from the up-wind boat that broke free.
was braided nylon and I used braided nylon to the mooring ball. My first trimaran
was a Crowther Buccaneer 24 that might have weighed 600 pounds fully loaded. This little light boat was the dancer. It was the Corsair
36, the heavier boat, which never moved after it faced the wind. I always assumed it was because some wind was going under the nets, between both amas and main hull
and it kept it balanced and in place. But also it is very important to have the bridle
made that fits your boat. If the lengths are off by two inches the boat will sit funny
and that will stress the short side.
I stayed overnight a few different times just to get it right. With the stars out I think we feel a better connection to the wind and currents and that made all of the difference.
Each vessel has it pluses and minuses. Each vessel is connected to the sea and the wind. If you connect with those three your sailing life will be magical. Just say “taint so” to those who are unconnected. Then help them get connected.