Question: What is a Fishfinder GPS? Dave M.
Answer: A Fishfinder GPS is what is commonly referred to as a Combo unit for a boat. It contains a Marine GPS to show navigation and boat position, as well as a built-in sonar system for depoth and fishfinding. Both wil show up on the screen at the same time in split screen mode, or they can be viewed one at a time in full screen mode.