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Old January 12th 06, 12:39 PM posted to
Marc Onrust
Posts: n/a
Default Why do people buy cruising catamarans ?

Peter HK wrote:

"sherwindu" wrote in message
One question nobody has addressed yet is what happens when a cat
capsizes? There
is no natural righting moment, as with a mono hull. I have never even
sailed on a cat
myself, but the heeling of a mono hull seems to offer some comfort
advantages, because the combination of sails and pendulum keel act as a
kind of 'shock absorber' in wavy conditions. I would prefer to be
heeled over and on a steady lean than bounced up and down as one than
another hull is lifted and dropped by a wave, especially in
short choppy seas. Long rolling waves would probably somewhat nullify
this advantage. I am referring more to waves on the beam, but there
probably is some
effect on a close hauled tack.

Sherwin D.

There are occasional sea patterns that are uncomfortable on a multi, usually
with beam seas, but the magnitude of the event needs to be considered. Cats
reach max stability at about 5 degrees of heel (when a hull lifts). As this
never happens on cruising cats, all heel angles are less than 5 degrees.
Short sharp waves can occasionally exceed this a little due to the hulls
being in a trough and crest. Compare to a mono rolling downwind where heel
angles can be 30 degrees side to side.

Multis do have a different motion- shorter and sharper compared to slower
but much more amplitude on a mono.
Personally I find it quite comfortable. As stated in a previous post a glass
never spills, which is a significant observation on the severity of the

When a multi capsizes it floats- most are now equipped with hatches to enter
a secure part of the hull in a capsize. When a mono sinks however- dragged
down by that ballast that makes it self-righting- the only hope is a

It depends on what you think is the most basic safety feature-
nonsinkability or self righting.

Peter HK

I guess most people prefer to be upside-down-but-floating compared to
upright-on-the-bottom of the Atlantic. The next question though, is what are
chances of such events to happen? When I cross the Atlantic (or whatever
waters) I rather opt for a 1% chance to sink my monohull (and trust on my
liferaft) than a 20% chance of capsizing my cat. Now, both figures are probably
far from accurate, so my question is, what are chances that such things will