I've been playing with my Depth Raider for a season now and have found my fishing much better. What I'm not yet understanding is the relationship of current to the ball speed.

If I'm running one way at 2.0 at the ball and 2.6 ground speed (we'll call it lap one), then I turn around and am running 2.0 at the ball, but 3.4 ground speed (we'll call this lap 2), what should that be telling me about the speed and direction of the current?

Any help on figuring this out is appreciated. I imagine that the more I learn the more useful this device will be.