On Sun, 26 Aug 2007 08:11:50 -0700, terry
wrote:

New RG58 proposed for mast head VHF whip.

RG58 is very lossy for a run to the masthead. Consider something like
this: http://www.radiobooks.com/products/rf910.htm

Otherwise you will lose over half of your power just getting to the
antenna. It makes a big difference, especially on sailboats.