Wayne.B wrote in
:

And larger at times. I once had a similar condition with the shield
braid on a coax cable. Apparently the outer insulation had developed
a pin hole leak allowing moisture to enter. The copper braid in that
section had turned to green powder and was totally non-conductive.



I have never seen a piece of plastic covered coax cable like RG-58 that
DIDN'T have water ingestion if laying in water for any length of time. It
always eats the shield away...salt or not.

If you MUST run coax through the bilge, like to get to the mast, one great
way to prevent ingestion is to run the coax through a piece of nylon water
line, the kind used to hook up the house water source to the ice maker in
the refridgerator, that's just big enough to pass the unconnectored coax
through as a sort of flexible, sealed conduit through the bilgewater area.
Seal it on both ends with 3M 5200 forever. It now has virtually no
airspace to breathe in and condensate water and the water line is
impervious to the oil, grease, gook, amazing biological species and
seawater in the bilge....(c;

Small nylon airhose is also great, but it usually comes in a self-coiling
section, now, not a straight piece like the water line.