A 19th century self-propelled torpedo, one of the first ever to be developed and used by the Navy, was recently discovered by specially trained dolphins off the San Diego coast.
The 130-year-old Howell torpedo was found in March near the Hotel del Coronado during a mine-training exercise. The Navy trains and uses dolphins to find and mark the location of underwater objects as part of its Navy Marine Mammal Program.
Only 50 Howell torpedoes were produced and just two of them have ever been recovered. The Howell torpedo, an 11-foot-long brass torpedo, was developed between 1870 and 1889.