Correct, GPS unit is in the top of the TM however, if the remote loses signal with the unit, it will turn it off and on.

We use it alot while trolling in the Upper penninusal of Michigan for Walleye. If it is around your neck and you bend over to tie a knot or do something, it loses signal with the power head. We ended up putting velcro on the back side of the remote and leave it at the helm. No problem since that time.