hvyhaul
Well-Known Member
I don't know anything about this unit but is this just giving you SOG {speed over ground} or is the info different?
Your GPS /Graph gives you that, the FH gives you speed relative to the water you are in. If there is a current in the depth you are fishing the speed will be different than the surface speed displayed.
Speed is calculated by the paddle wheels not by locating.
The variables are direction and speed of the current.
Yesterday because of the past winds, where I fished, there was next to no temperature difference and very small currents.
A week ago the difference was huge and required a lot of throttle changes to adjust for them.