Explains how a connected a low cost handheld GPS to a low cost (on sale) VHF marine radio. This supports DSC (digital selective calling) and automated distress calls.
(I'll upload some photos of this tonight)
Step 1: The parts I started with
The VHF radio - I picked this up new, at a really good price due to a sale. In the process I also learned that it can be connected to a GPS and learned how the automated distress signal works. I also learned that with DSC it can send position info to other boats.
(note: at the time of purchase, I didn't know it could work with my handheld GPS)
The ETrex GPS - really cheap haldheld unit that has served well over the last couple of years.
DB9 Serial Connector - from an old computer. You should be able to find this at your local electronics shack.