The Cruise Sub 7 1140 by U-Boat Worx is the deepest diver among the group. The seven-person sub can descend to 3,740 feet, a deep-sea experience akin to floating in space. The air-conditioned U-Boat has two back-to-back acrylic spheres, with three passengers facing forward and three backward. Seats are mounted on revolving platforms, so everybody can reposition themselves to enjoy the same views of the underwater world. U-Boat’s flagship model also has eight thrusters: four vectored horizontal thrusters, two dedicated horizontal thrusters, and two dedicated vertical thrusters. This not only gives the Sub 7 turn-on-a-dime maneuverability but also gives it the horsepower to navigate strong currents. The Sub 7 can operate up to 16 hours under water.