Deep - sea craft that can dive to 500 ft is light enough to launch from a yacht . Brainchild of Captain Graham Hawkes who is in process of building first craft . `` We just finished flight testing 'Superfalcon . ` ` Deep Flight ' '' has no price tag yet but current sub ` ` Superfalcon '' cost $ 10 million . Submarine : This has a capability greater than the U.S. Navy .
Deep - sea craft that can dive to 500 ft is light enough to launch from a yacht . Brainchild of Captain Graham Hawkes who is in process of building first craft . ` ` Deep Flight ' '' has no price tag yet but current sub ` ` Superfalcon '' cost $ 10 million . Submarine : This has a capability greater than the U.S. Navy .