Originally Posted by Fire Escape
There seems to be a 'work around', I was directed to someone in vendors who manufactures a weatherproof USB socket, I ordered two this morning. It may be a while before I know how successful this is but at least I am more hopeful that I was of actually being able to use my GPS.
USB is only 5 volts. Other people who know more about this stuff than me have said low voltage power does not need to be weatherproof.
Something about water having a high resistance so that only high voltage power will jump across it... Anyway, as far as I know USB power should work perfectly fine fully submerged without any waterproofing.
But you might run into problems with vibration and rust depending on how well it is made.