Sign me up! The Seabob Cayago F7 is a bit like an underwater jet ski. It has 734 Newtons of thrust, am impeller jet system, 10 gears, and a top speed of 12 mph. My biggest fear after watching the videos is the fact that you look just like a seal ripping through the water. In other words, shark bait. Video of the Seabob Cayago F7 after the break.