Hello! The subject of Multihulls vs. Monohulls is a hot one, and is likely to continue to be. 🙂 However, there is one designer who has put online a very good paper on multihull seaworthiness. It is, of course, true that he is a catamaran designer, so the criticism may be the paper is biased, but it is very technical in nature, and I find (having an engineering background) reasonably complete and suited to the informed lay reader.
The article on your site I am referring to is: Multihulls.
John Shuttleworth’s article on multihull seaworthiness is here: http://www.steamradio.com/JSYD/Articles/NESTalk.html
I believe that your opinions may be swayed by his treatment. As always, seaworthiness is as much a function of the crew as of the boat, but a good crew with a bad boat can only go so far. I was very timid about the idea of multihulls and blue water, but decided I would research it before making up my mind. What I found were many good sources of experience reports (MultiHull Voyaging by Thomas Firth Jones for example) which finally convinced me that multihulls, designed correctly, could be as seaworthy in blue water as a well designed monohull, if not more so.
I have heard a bit about storm tactics and multihulls, and the one thing I have heard that I do not know if you have mentioned (not having purchased your book yet) is using a large para sea anchor. I am told that using a very large para anchor, head-to the seas, creates a slick much like the one one gets with a keel boat that is properly hove-to. The idea is to use the para anchor at roughly a one wavelength distance from the boat. This saps the waves power as it comes towards the boat and will then rarely, if ever, break across the bow. Since swell cannot capsize a boat, it stands to reason that this would be a very good tactic.. a sort of heaving-to for a multihull. The para anchor should be something like at least 75% of the beam. I have heard that 28 foot, nylon para anchors are most common, being able to be gotten from other sources than custom. Have you heard of this tactic?—Timothy
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