From Born Rich:
This luxurious undersea vehicle is designed to explore the deep seas in complete safety and comfort. With an overall length of 66.5 m, the U-010 unit is a unique vessel for its quality to travel on the surface as well as underwater by simply passing from diesel to electric propulsion. Equipped with integrated systems of stabilization, the passage on the sea surface is slow and comfortable even under the worst conditions.
More pics here.