I just bought a SH VHF radio with AIS. It's still in the box and should get it installed next week. It looks like all the parts are there.
I called SH tech support to get advise on interfacing the VHF with my existing Garmin GPS. The tech guy walked me though the whole process to the point of telling me to connect the green wire of the GPS to the brown wire on the radio. He had the Garmin GPS manual in front of him when he was explaining all this to me. That is exceptional customer service.