Join Date: Aug 2006
Location: Arlington, VA
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With a second VHF in the cockpit, you definitely want a separate antenna. I'd put one on the pushpit. It will have plenty of range for the type of transmissions you'd normally do from the cockpit (contacting other boats within visible range, port facilities, etc.).
I have a RAM mic and, while I like it OK I'm not sure I'd go for one a second time. Good waterproof VHF radios can be had for the same price and, with a second antenna, provide 100% redundancy....a good thing.
Whatever you do, don't go the splitter route...losses, potential damage to radios, unnecessary complication, etc., etc.