Ocean Submarine in the Netherlands is building a 62-foot (19-meter) luxury submarine with an interior from the private jet industry. 

Rolls-Royce, MTU and Bosch are some of the partners in the Neyk Submarine, which is expected to achieve a speed of 15 knots—much faster than conventional private submersibles. The first model will carry 12 passengers to depths of 492 feet (150 meters) when launched in 2018. 

oceansubmarine.com