What type of GPS's are y'all using in your boats? Name brand? Type? Etc.

Brand - Garmin
Model - Foretrex

Yes,
That's the one I use. Actually it's the one most of the guys I know also use.

All I can find are 101, 201, 301, 401... Are one of these the right type?

Sorry,
I don't know those numbers. All I know with model # is Foretrex and eTrex'H.

Garmin make the Foretrex and Forerunner with these numbers. The models have several generations over the years, the first one was the 101 (no longer in production) and the latest is the 401. If you get a foretrex or forerunner 401 it will suit your needs in a model boat.

Thanks Fellas...