looked at this unit
I looked at this unit at the Annapolis boat show and found that they were very proud of their prices. Not a bad idea but you still have to go up the mast. It also needs batteries which you have to replace in the sending unit, back up the mast. I added a wind speed, wind direction this past winter. Question- you have a 1981 boat, when was the last time the wiring was replaced and what shape are you steaming and anchor light in. I had the stick taken down and replaced it all. New wiring, new lights, new TV antenna, and install the wind speed wind direction. I hooked the new wire to the old wire and just slowly pulled it through the pipe in the mast.Might be time to make this a bigger project than you first thought about.Good luckIans/v Meant to Be