Hi,
From experience I can agree with Talbot! We own an FP
Belize 43 located in
Norway and have been sauiling a lot during our
winter up here.
I have insulated the
deck with special
insulation, which has helped both on keeping the boat warm and free of
condensation. The sidedecks are massive GRP, no foam
core, hence insulation required.
The main problem I have found is the hatches. The aluminium frame bridge the cold directly into the warmer
interior creating massive condensation. Less hatches is good for the cold climate but not so for the tropics! I have made "mats" with several layers of bubble wrap, and attached underneath each of the hatches. All 21 of them. This has kept the condensation level down to what can be accepted.
The
hull structure is foam
core, which is sufficient to eliminate any condensation and also a good insulator.
We use the engines to provide heat via heat exchangers and fans and also one dieselheater from Eberspacher. There should however be one in each hull.
When in
dock we keep the
shore power on and I have installed Ex certified 50W block heaters on each
engine that keep them frost free. Means I don't have to drain the seawater side of the
cooling system and the motors are always ready to go.
The seawater cocks also have the same
heater, but in general the seawater does not freeze in the cock but a bit up inside the boat so that need to be insulated as well. A seawater cock that cracks from freezing will most likely sink a mono and fill some serious amount of flooding in that hull on a cat.
One thing I cannot keep operational throughout
winter is the fresh
water system onboard. The water
tanks are located on the bridgedeck and will be suseptible to freezing with subzero temperatures. Also the
plumbing is inaccessible for insulation. We therefore use 3 x 10 litre water cans that we keep in the fridge. This sound a bit strange but every time we're onboard we open the fridge door and let some warmt into it. It then keeps above freezing until the next time we come onboard, usaually every weekend.
Sailing wise you need to cover up all the ropes and winches. If they get wet and it frezzes there will be no sailing until warmer weather comes along.
The
steering on our
Belize has never had any problems with freezing.
For winter
navigation I would consider a cat with good alround visability so you can navigate from the comfort of the
saloon. By having a
chartplotter inside and a
remote for the
autopilot you only have to take small trips outside to adjust the
sails. We also have a
hatch in the gally that let us check the
sails when on starbord tacks, not very helpful on port tacks though.
The
cabin sole cant be insulated on our boat but bu using some non slip boat carpet thats not too much of a problem.
We keep the boat in a river and therefore can use the boat all trough winter unless the arcipelago surrounding us frezzes up. Lats Easter we where down on the Swidish westcoast and experienced our coldest days of -12 Deg C. We had 5 fantastic days!
A cat can function well in the artic, but it takes more effort and therefore cost to modify than a
monohull and probably you could keep warmer in a mono -- when at the docks or moored, you cannot sail a mono from down below!
Also make sure you use witerized
diesel, summer
diesel will clog up the diesel filters. Also make sure the fresh water
cooling on the engines have a mixture of
antifreeze. This must be to the
motor manufacturer specification otherwise the could be internal
corrosion problems over time.
Good luck with your cat search.
Cheers from Lars
Happy lead free sailin!