On Sat, 21 Nov 2009 21:55:01 -0500, wrote:

Here's one source online with several choices -

http://www.radioworks.com/ccoax.html

You have to be careful with those cables in a marine application.
They will soak up salt air like a sponge if given any opportunity at
all and will end up worthless. The RG142/U has a solid teflon
insulator which is quite moisture resistant and the double silver
plated shield keeps the signal inside the cable where it belongs. It
is MIL Spec rated for a reason.