Move up to Standard Horizon's GX2150 (w/o GPS) or GX220 (w/ GPS). They both have AIS receivers as well. I had no problem hooking my 2150 up to my chartplotter, which provides the GPS signal. I've also used the Fog Horn capibility a few times on Lake Michigan in fog. Actually, it's nice hooking these newer radios up to your chartplotter anyway, just to see the DSC or AIS information right on your larger chartplotter screen. The VHF Radio screens are usually smaller, and most of us mount them in positions that don't provide the best view, other than to change channels. Colby