Rodney Myrvaagnes wrote in
:


You still need to find the problem. Every radar I have seen, Furuno or
Ratheon, has the drain tube in the bottom, so the interior is open to
the atmosphere, but protected from splash.

Well, the problem must be with the design. There's been three DIFFERENT
radomes, the first two all got water in them. Raymarine said in "some
environments this happens". Sounds crazy. Charleston SC must be one of
them. I'm convince the same thing is happening inside the dome as a half
empty gas tank, which will just fill with water around here. Sucks in 100%
humid air at dusk, condenses all night, then the dense air blows back out
the drain hole when the sun shines on it until the sun set again when the
process repeats. A vented gas tank does the same thing, especially if its
sitting out in the sun with little gas in it.

The cure is to SEAL the dome. That's pretty hard to do with such thin
plastic and only 4 little screws holding the top to the bottom around the
seal, which only grips the bottom well. I'm for putting in a Muffin fan to
dry it out while its sitting at the dock. Hell, none of it's sealed,
anyways.....