Question: What is a Fish Finder? Walker E.
Answer: A fishfinder is a device used on a boat to scan the water below the boat for objects and fish. It uses a sonar ping to send a signal downward, then listens back for the signal. This creates am image on the fishfinder screen to show depth, obstructions, and fish. Fishfnders are very commonly used by fishermen to locate fish. They are rated by their transmitting power and screen size. The common sizes are 600W for smaller boats in shallower water. 1kW for larger boats in deep water. All the way up to 3kW for commercial boats. Screen sizes vary from tiny 4" screens up to huge 16" screens. Fishfinders start around $200 and can go into the thousands.