PhotosKayak PowerApril 2, 2012Hobie's MirageDrive system propels a kayak with two vertical fins that work in a back-and-forth motion.Native Watercraft's Propel Drive system uses bicycle-like pedals that power an underwater prop.The Freedom Hawk Pathfinder has inserts for conveniently mounting a trolling motor if desired.Because Hobie's Island series of kayaks are both stable and fast, they have been used successfully for offshore trolling.Ocean Kayak's Torque model is equipped with a 36-pound-thrust Minn Kota trolling motor built into its hull.