9 Watertight underwater enclosures for temperature sensors, pressure sensors, depth sensors, cameras, photographic flash units, electronics, batteries and underwater vehicles; Sensors, namely, temperature sensors, pressure sensors and depth sensors; Electrical cables; Electrical circuit boards; Sonars; Sonar equipment and parts thereof; Underwater vehicle propulsion and motion control systems and parts, namely, electric thrusters, electric rotary actuators, and electric linear actuators