The Underwater Leisure Complex (ULC) is similar to existing tourist submarine technology, however it has two large passenger viewing galleries. Large view ports and luxury seating within each gallery provide a panoramic scene over the surrounding reefs and seabed. A cocktail bar provides food and refreshments to the submersible passengers during their dive. In addition, the diver lockout compartment allows certified scuba divers to exit the ULC submersible, while the complex is submerged.

The ULC submersible is 42 m long and has a beam of 13 m and comprises of four major compartments, arranged in a catamaran style structure. The two upper cylindrical compartments, contain the passenger viewing galleries, pilot control station, cocktail bar, and diver lock-out compartment. The two lower cylindrical compartments house the main batteries, machinery, and auxiliary equipment. All compartments are connected by man-ways, with access being available at all times. The submersible is controlled from the pilot's control station, situated in the forward section of the main viewing gallery.

From this position the crew are able to fly the complex over the seabed, control all the main operations and equipment of the submersible complex and dive or surface as necessary.
The submersible complex was built in West Germany, and has sucessfully completed shallow water diving trials in the Baltic sea. These trials comprised testing of the propulsion systems, submerging, positioning in the sea bottom, and surfacing. A function test of all onboard systems was also completed. All tests were certified by Germanischer Lloyd. The submersible complex is now ready for final outfitting and operational diving trials.