Submarines of the Imperial Japanese Navy
The ("I-15"-class) submarines (, , , , , , , , , , , , , , , , , , , ) were the most numerous type of submarines of the Imperial Japanese Navy during World War II. In total 20 were made, starting with "I-15", the class ship. These were fast, very long ranged, and carried a single Yokosuka E14Y seaplane, located in a hangar in front of the conning tower, launched by a catapult.
Isla San Telmo
The wreck of a submarine can be seen off the beach during low tide. The Japanese had examined this submarine and stated that it did not belong to them. However, a subsequent underwater study by German divers reported that it belonged to the Japanese, having wrecked when the Japanese intended to destroy the strategically important Panama Canal in 1942. It was conjectured that the submarine was abandoned by its crew due to technical problems and the crew had taken refuge on the island.