U-BoatWorx widens portfolio confirming global Nr. 1 ranking

BREDA – Dutch submersible maker U-Boat Worx, the largest private submarine supplier globally, has built a researcher sub for a Feadship superyacht that can dive to depths of 480m.

The superyacht is the Shinkai, the world’s first superyacht designed around a submersible, says the company. It adds that when the 54.9m explorer yacht owner placed his order with Feadship, he already had a new U-Boat Worx C-Researcher 3 waiting in the wings. Japanese for ‘Deep Sea,’ Shinkai sets a new bar for bespoke superyachts.

U-Boat Worx has also unveiled a custom Super Sub, the fastest in its fast-growing portfolio. It accommodates a pilot and two passengers and has an 8kt top speed, faster than cruising dolphins and the fastest speed of any private sub anywhere.

U-BoatWorx C-Researcher-3 sub explores a reef
U-BoatWorx C-Researcher-3 sub explores a reef

The Super Sub can go down 300m and make steep 30-degree climbs and dives. It is 5.30m (17.4ft) long, 3.09m (10ft) wide and 2.31m (7.6ft) high.

U-BoatWorx was founded 16 years ago. It makes private subs for the high-end yachting, cruising and research markets.


U-BoatWorx' Super Sub
U-BoatWorx’ Super Sub

In recent years, the company’s workforce tripled to more than 100. As of next year, U-BoatWorx expects to build up to 30 subs a year, including the Nemo, its smallest for exploring wrecks, reefs, or the marine environment 100m below the surface.


The company runs the world’s first submarine training center in Curaçao. In 2021, 25 submarine pilots were trained and certified for various U-Boat Worx submersibles.

U-BoatWorx' submarine school in Curacao
U-BoatWorx’ submarine school in Curacao

All U-Boat Worx subs have a single lifting point, which allows for safe and quick launch and recovery. Aboard Shinkai, this is enhanced with a man-riding crane installed on the yacht’s aft deck. With an almost 8-meter reach, the heavy-duty crane can quickly deploy and retrieve the 6.9-ton submarine.

Simple, efficient and built to the owner’s specified short delivery time, the ruby red C-Researcher 3 with a gray leather interior will take the owner to a world of underwater exploration and give him a front seat view from the sub’s air-conditioned, acrylic hull