[Elusive]

I have the Standard Horizon HX471S which has DSC and an external GPS connection.

I have the charging cradle (also connects to NMEA) mounted on my console.

I wear the radio in a holster & pop it into the cradle for a postion fix regularly throughout the day.

You could make a wiring harness that would allow a connection to a HH GPS

I love the radio (also has WX, FRS, FM, etc), but wonder how useful the DSC really is, given the limited range of a HH VHF