Today marks the 28th anniversary of the sinking of the Peruvian Navy submarine Pacocha which was lost off the Peruvian port of Callao near Lima. Running on the surface on the night of August 26th, 1988, the Pacocha was accidentally rammed by a Japanese fishing trawler. Mistaking the conning tower of the sub for a small craft and thinking the two craft would pass one another harmlessly, the trawler’s crew did not take evasive action and the trawler struck the sub’s hull. The Pacocha‘s captain, Captain Daniel Nieva and six crew members were killed immediately while twenty-two sailors were able to successfully abandon ship. The United States immediately dispatched an underwater rescue team, however, the Peruvians quickly deployed a diving bell and, within 24 hours, gained access to the sub’s trapped crew through one of the Pacocha‘s hatches. The remaining twenty-three crew were safely brought to the surface, escaping an excruciating death of painful asphyxiation from chloride gas or drowning as the sub’s remaining compartments slowly filled with water.
Ironically, prior to its service in the Peruvian Navy, the Pachoca had been the USS Atule, a Balao/Guppy class diesel submarine whose sole kill during World War II was a Japanese merchant vessel, the Asama Maru. Later, the sub torpedoed and sank the former Kriegsmarine U-boat U-977 during naval exercises in 1946. After thirty years of service in the US Navy, the sub was sold to Peru where she was named after a 19th century Peruvian naval battle. Following the rescue of her crew, the sub was later salvaged and scrapped.