Use our SUBMARINE SEARCH to filter right submarine for yourself among all available personal submarines for sale. You can filter by mini (small) submarines, large submarines (using Occupants filter), one-man or 2-person, tourist or private, deep-sea or yacht submersible. The mini submarine discovered in Keʻehi Lagoon in 1960 is lifted to the surface by the U.S. Navy. Photo courtesy of Naval History and Heritage Command In 1951, one of the two missing submarines was discovered in shallow water off the entrance to Pearl Harbor. The subs will be delivered in 2018 and 2019, and are expected to serve for several decades. US Navy SEALs are trained to infiltrate enemy territory by sea, air, and land. Mini-submarines are used to infiltrate hostile areas with accessible coastlines. The Mark 8 SEAL Delivery Vehicle allows the Navy’s elite underwater commandos to … But prototype DCS mini-subs cannot fit inside the current shelter design. The Navy says it has yet to make a final, formal decision on adding mini-torpedoes to its submarines, or any other potential launch platforms, but it is still certainly working that direction. As a result, a modernization program will stretch the DDS units by 50 inches, according to SOCOM's briefing.