Humminbird RT25 fish finder
Help make Dad the big man on the boat with this $80 waterproof fish finder from Humminbird. Utilizing a remote sonar sensor with a 150-ft. (46 m) operating range working at depths up to 120 ft. (37 m), the big advantage of the RF25 over other sonar devices is that it attaches securely to the fishing pole rather than sitting at Dad's feet. The result is fewer distractions, ensuring that your old man keeps his eye on the prize when the fish start biting.