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Old 04-20-2008
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Using a heavy curtain around the companionway might help with the heat flowing out and the fog rolling in. If you treat the companionway kind of like an airlock, and close the curtain before opening the dropboards and sliding hatch...and vice versa... it should help retain a good bit of heat in the boat.

Adding insulation to the interior of the boat would also help. One sailor I know used the reflective "space blankets" and foam board to insulate his boat and it made quite a difference.

Not using your hatches and using dorade-type or mushroom type vents can help a lot too. Especially if you run duct work from the vents to low in the cabin, since you can leave the vents open and if they pull air out, it will pull out the colder air at the bottom of the cabin, rather than the warmer air from the top.

Also, if you can find some soapstone, preferably in brick sized chunks or blocks, you can use a relatively primitive, if effective heater based on them. Soapstone was used for fireplace hearths for a good reason... it heats up and retains heat a long time...and re-radiates it quite nicely. Heat up a few of these over the stove, then wrap them in cloth and set them on the cabin sole.

I think the real trick is to keep the air moving through the boat, but not let all the heat escape. I hope these help.
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Telstar 28
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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