The submarine Abtao (SS-42), formerly Tiburon (S-42) is a museum boat in the port in Callao , where the Peruvian Naval Museum (Museo Naval del Peru) and the Museum of the Callao Fortress (Museo Real Felipe) are also located are. It was originally a type 231-EA boat. Construction of the S-42 at the Electric Boat Corporation shipyard in Connecticut , USA, began in 1952, and was launched on October 27, 1953. It was completed on March 1, 1954. When it was commissioned on July 20, 1954, the boat became part of the Peruvian Navy .
The boat was the only ship in the Peruvian Navy that bore the name Tiburon . The name is the Spanish name for shark . In March 1957 the name was changed to Abtao in memory of the naval battle of 1866 during the Spanish-South American War .
After it was decommissioned in 1998, it has been on display as a museum ship since 2004. A Peruvian battery from the Battle of Callao in 1866 stands at the entrance to the museum.
