Re: Looking for a VHF Radio
All VHF Marine Band radios sold in the USA will meet the FCC required performance specification. Radios are not self-aware and they don't know where they are being operated; they work the same no matter where you use them. The Laws of Physics remain the same no matter where you are, too. If you are worried about your range of communication, install a good antenna and locate it as high as possible on your boat.
I prefer VHF Marine Band radios made by Standard-Horizon because:
--their operating controls are well designed and easy to use;
--the transmitter modulation is generally much better than competitors' radios
--their post-sale technical support is excellent.
For a good VHF Marine Band antenna installation for a small boat, see my article:
VHF Marine Band Antennas For Small Boats
http://continuouswave.com/whaler/reference/VHFAntenna.html