Installing A GPS Speedometer In Your Boat - Tips and Results 

I'd been running without a speedo for years, but after getting some 'feedback' from the Coastguard after returning to the ramp that I was probably over the 5 knot limit I decided it was time to get a GPS speedo (From Amazon - amzn.to/2RKN8AL) to keep tabs on my speed. Here is my installing into a fibreglass runabout OMC Evinrude Control unit, and how it performed in the water.