Deep-sea sub that can dive to 37,000 ft is light enough to launch from a yacht . He now sells his designs to wealthy sailboat owners as the ultimate yacht accessory . Comment: The submarine would have to be able to travel at speeds of up to 30 knots ( about 25 miles per hour ), and it 'd need an engine capable of producing more than 10 megawatts `` Deep Flight II '' has no price tag yet but current sub `` Superfalcon '' cost $ 1.5 million . Hawkes : Superfalcon has a capability greater than the U.S. Navy .
Deep-sea sub that can dive to 37,000 ft is light enough to launch from a yacht . Comment: The submarine would have to be able to travel at speeds of up to 30 knots ( about 25 miles per hour ), and it 'd need an engine capable of producing more than 10 megawatts `` Deep Flight II '' has no price tag yet but current sub `` Superfalcon '' cost $ 1.5 million . Hawkes : Superfalcon has a capability greater than the U.S. Navy .