This press release makes a lot of generalizations, most that apply to
sailboats, though it doesn't make that clarification. Some of the
readers of this list are still exploring catamaran options so I think
it's only fair to provide multiple perspectives on some of the
statements below. I trimmed some text from the original to stay within
the list size limits.
Bob Deering
Juneau Alaska
Catamarans have been the fastest growing segment of the sailboat market.
In the past couple of years the growth of this market has been over 20%
per year. Due to this rising market's popularity the demand is greater
than the supply at this moment. Taking this into consideration,
catamarans have higher resale values over monohulls. Cats have been
selling at prices close to or greater than what the owner originally
paid for the vessel. This advent is firing the growth of this industry.
(Cats also often cost significantly more for the initial purchase. As
the press release says above, demand is CURRENTLY outpacing supply. But
also above it says that this is the fastest growing boat segment, which
means that eventually supply will catch up to demand and prices will
fall. Resale value is certainly important, but buying a boat as an
'investment' is a crazy thing to do.)
Cats have excellent load-carrying abilities. (Relative to comparably
sized monohulls, their load carrying abilities are often significantly
less - skinny hulls and a sensitivity to the wing deck getting too close
to the waves as the hulls sink down. But that's not necessarily a big
deal for pleasure boats since they aren't hauling loads of fish or
cars). This is why they are often used as ferries; they provide a safe
and stable platform.
Catamarans have the ability of smothering rough water. The environment
that is created by having two parallel floats(hulls) causes for air to
be trapped between these two apparatuses providing additional lift.
(I've heard this claim repeated many times, but I'm not convinced that
it's significant. Not saying it isn't true, but I've never seen a
rigorous engineering study supporting that claim. Can anyone produce
one?) This provides an invisible cushion as the vessel passes over wakes
and waves.
Catamarans will take you faster to where you want to go over monohulls.
It's not a question about whether you're sailing or under power,
catamaran designs are faster overall. (That's a pretty big
generalization. For displacement sailing hulls it may be true. For
planing power hulls that claim needs a lot of asterisks behind it. Hull
configuration, displacement, sea state, power plant. all play a role)
Catamarans are lighter for their length compared to monohulls. (That's
another generalization. My aluminum power catamaran is probably heavier
than many similar-sized aluminum power monohulls here. Cats have more
complex structural requirements and more surface area - by nature
they're HEAVIER boats. The reason cats are lighter is that they are
built that way by necessity - foam core and vacuum extraction
construction, carbon fiber, careful design for weight minimization. But
all that high-tech construction comes at a cost, both in dollars and in
vessel ruggedness)
Along with speed, cats are much more maneuverable, especially when it
comes to power cats. (Again, a generalization. At speed, cats tend to
be less nimble, depending on hull design. While a monohull ski boat can
lay way over and bank into a sharp turn, a cat typically can't do that.
At slow speeds a cat usually has an advantage with the widely spaced
motors, but not always. Things like hull rocker and windage plays major
roles too.)
Catamarans are wider than monohulls. (Not always. The power cat I'm
currently designing is 45 ft long and 15 ft wide. Plenty of monohulls
are wider than that. But I'll be able to fit inside a standard slip.)
Given this fact a catamarans interior/deck is much more spacious. A 50ft
catamaran has the same room as a 60ft catamaran (monohull?). In other
words, a monohull has the same volume as a 10ft shorter catamaran. Cats
give you the benefit of anchoring in shallow waters due to their small
draft. (Depends what you're comparing to. A planing monohull might
have less draft than a comparable catamaran.) This gives the option of
having a larger list of areas to anchor in than monohulls.
Since a cat has more room it creates a home like feel. The interior
layouts tend to be more private. (Only true on larger cats. On smaller
cats the hulls often are too narrow to allow accommodation, so
accommodations become LESS private) Heads and showers are separate. The
dual hull layout gives way to the advantage of having heads and showers
in opposite corners. Catamarans around the 40 foot range provide enough
room for queen-sized rectangular beds. You don't have to deal with the
discomfort of pointy beds as you see in monohulls of the same size. The
greater surface area also creates more storage room, so passengers don't
have to leave things behind. The added room can also mean you can pack
for longer trips. (Yes, until you start to run into the decreased
payload capability of a cat.)