boatgeek wrote:
Going to the original question, my family and I have been living aboard
cruising catamarans since 1996. First a PDQ 36 and now a St Francis
44. This question comes up a lot, so I'm going to answer it as fully
as I can because I believe it's a good question that is sometimes
incompletely answered.

*Speed. Our St Francis will do around 8 knots in 11 knots of wind, at
15 knots of wind we break into double digits. Under power we can go
over 10 knots. There are faster monohulls out there, but our boat has
3 heads, a galley with 9 ft of counterspace and a 3 burner stove, an
massive arch with a dingy hanging off it. We're not trying to break
speed records, but it's a good performing boat. This is without
flying a chute.

*Stability. I don't see it actually from a comfort point of view as
much as safety. If the boat doesn't rotate 45 degrees because of
fluke wind shift it means my wife and son don't get thrown around like
rag dolls.

*N+1. This is a geek term. It means that most systems are redundant.
Two motors, two fuel tanks connecting the motors, two water tanks and
two water pumps, two seperate battery banks, etc, etc. What this
means in practical terms is you can have an engine overheat and still
make 6 knots on the remaining engine while CHOOSING where you want to
repair the fault, rather than having to do it immediately. That's a
big deal when trying to fight your way into a narrow port entrance in a
gale directly against the wind. Been through that particular scenario
several times.

*Positive bouyancy. I know quite a few different PDQ 36's out there,
and one lost both of it's keels being up on a reef. Another had it's
transom ripped off by a boat, one crashed it's bow against a bulkhead
3 feet back, and my actual boat had at one time a 2 ft hole smashed
into her from a race (previous owner!!) on her starboard side. None
sank. All are sailing now.

*Privacy with guests. It's nice having guests over, we have them
often. But they are in a seperate hull, quite on their own. It's the
equivalent of having them in a boat one slip over. It makes having
guests over twice as fun.

*Aft Arch. We can and do carry a large RIB ready to go at a moments
notice with 4 175 watt solar panels. Having a nice fat transom makes
that possible. While cruising non of the 5 monohulls we cruised with
would even bother launching their dingy's because they knew we could be
over, pick them up and have them to the beach before they could get
their own dingy ready for the water. That translates also in being
able to address a problem quickly underway. I can stop and launch a
dingy to assist another boat in just 3 or 4 minutes.

*large wide decks. I can go up forward in a hurricane with a spare
anchor in my hand and stick to the middle of the boat and know that I
wont go over the side. I can go up forward in any conditions (but I
do clip onto a jack line) and know that I have 10 ft of clearance
between myself and the side of the boat. That's a huge safety issue
to me and my wife. I saw one artical about a monohull sailor who'd
been clippen into a jackline, fell overboard from the bow and was
dragged in the water for far too long. That can't happen to me, I
can't fall on a 6 ft tether 10 ft from the middle to the side of the
boat.

*Shallow draft. Every tropical storm or hurricane that I've been in I
could head into a hurricane hole inaccessible to most monohulls. The
shallow draft anchorage also means that I typically can go to a close
beach with my dingy in shallow protected water.
Big issue there that no one seems to realize. In Georgetown in the
bahamas I was able to anchor in a huge storm in a very small protected
anchorage right outside town in 4 feet of water. No one else could
get into town, I could simply row a few feet to the beach and walk in.

*Good visibility from inside. I can on the settee, warm and snug at
an anchorage, and look out and see what boats are breaking free from a
storm. Sitting in your cockpit during a storm as an anchor watch is
relatively uncomfortable, and many people therefore don't do it as much
as they should and the first sign of a problem is the thud of a boat
hitting them that's broken free.

*Cost. Our St Francis has the space of a 50 ft mono, but not the
costs. Price per foot may be greater on most cat's then most
monohulls, but price per ft of interior living space is often less.

*twin short keels. It allows us to "walk" off a beach and easily
kedge ourselves back into the water should we drag onto the shore (ok,
not too proud to admit that). But imagine having dragged anchor in the
middle of the night. In a monohull you'd be woken up by the fact they
you are lying completely on your side with waves threatening to wash
into your cockpit and down the companionway. At best, you would call
sea tow. I woke up, perfectly upright, realized the soft mud didn't
hold my anchor, and lowered the dingy and kedged myself off the bar in
about 15 minutes. My wife prepared breakfast while I did that.

*Most catamaran thru hulls are above the waterline. I've seen too
many monohulls sink because a hose fitting for their sinks came loose
during the night. I've also had my hose fittings also come loose on
my galley sink drain, and had to tighten them again. That's it. No
water rushing in, no panics. Many monohulls have a dozen or more thru
hulls. I have less than half of their below water thru hulls, and
were a thru hull to come loose, it's not as low in the water because
the water intakes don't have to be extra low to compensate for heeling.
That means far less water pressure, therefore less water coming in,
and my bilge pumps can easily keep up. Even if they couldn't
watertight bulkheads would prevent it from spreading very far and worse
case after around 2 ft the positive flotation in the bow and stern
would prevent the boat from going any further down. Not nice, but it
wouldn't sink.

*Capsizing - Some believe that the monohull ability to heel to dump a
gust of wind gives them an advantage because the catamaran can't heel.
True, cat's don't heel. We accelerate. That's the way catamarans
have the same "pressure valve" for dumping unexpected gusts, we can't
heel, therefore the force is directed into motion forward. That's the
safety valve. I've been in the gulf stream in November, in large
waves and trade winds down in the caribbean, I go fast. While going
fast I can take my time and reef the sails without worrying about
falling over the rails. I think the reason this keeps coming up is
that every serious cruiser in a monohull has had a knock down and that
fear is very present in their minds. I've been in the same wind gusts
on a monohull and a catamaran. The monohull was knocked down and then
righted itself, the catamaran just went faster. We do tend to
compensate for this by sailing more by the numbers than a monohull
would (reef at 20 knots, reef again at 30 knots, even if it feels
completely under control).

I hope this helps some who are looking at catamarans. Almost every
reason I have isn't due to convenience, it's due to safety.

Cheers,

Doug and Cindy and Zach
St Francis 44
Annapolis, MD

Great post! Very informative.

Thanks,
Gaz