On Sep 10, 10:08*am, "J. Clarke" wrote:


Another approach might be to use a water bed. *That 87 degree water is
about ten degrees cooler that your body and in a water bed without
foam insulation between you and the waterbed mattress will feel down
right chilly. *Doing something like that could keep you comfortable
while you sleep and reduce the power needed in a 24 hour period.

The question that comes to my mind is "how big is the boat". * A water
bed is a large almost-free surface and it could to really bad things to
stability.

I should have said " something like a water bed." You would not
that much mass. With a lot less mass you would probably want some way
to circulate water through the " marine water bed ". And a PIC to
monitor the temperature and turn the pump on and off as necessary.

Dan