Name I-9 Commissioned 13 February 1941 Fate Sunk, 13 June 1943 Construction started 25 January 1938 | Laid down 25 January 1938 Struck 1 August 1943 Launched 20 May 1939 | |
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The Japanese submarine I-9 was a Type A1 submarine built for the Imperial Japanese Navy (IJN) during the 1930s.
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Design and description
The submarines of the A1 type were versions of the preceding J3 class with superior range, improved aircraft installation, and were fitted as squadron flagships. They displaced 2,966 tonnes (2,919 long tons) surfaced and 4,195 tonnes (4,129 long tons) submerged. The submarines were 113.7 meters (373 ft 0 in) long, had a beam of 9.5 meters (31 ft 2 in) and a draft of 5.3 meters (17 ft 5 in). They had a diving depth of 100 meters (330 ft).
For surface running, the boats were powered by two 6,200-brake-horsepower (4,623 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 1,200-horsepower (895 kW) electric motor. They could reach 19 knots (35 km/h; 22 mph) on the surface and 8.25 knots (15.28 km/h; 9.49 mph) underwater. On the surface, the A1s had a range of 16,000 nautical miles (30,000 km; 18,000 mi) at 16 knots (30 km/h; 18 mph); submerged, they had a range of 90 nmi (170 km; 100 mi) at 3 knots (5.6 km/h; 3.5 mph).
The boats were armed with four internal bow 53.3 cm (21.0 in) torpedo tubes and carried a total of 18 torpedoes. They were also armed with a single 14 cm (5.5 in) deck gun and two twin 25 mm (1 in) Type 96 anti-aircraft guns.
Unlike the J3 class, the aircraft hangar is integrated into the conning tower and faces forward; the positions of the deck gun and the catapult were exchanged so the aircraft can use the forward motion of the ship to supplement the speed imparted by the catapult.
Construction and career
On 11 December 1941, I-9 sank SS Lahaina 700 miles northeast of Oahu. On 19 June 1942, the boatdamaged US Army Transport General W. C. Gorgas with gunfire. On 25 August, she was depth charged and damaged by the destroyers USS Grayson (DD-435), USS Monssen (DD-436), and USS Patterson (DD-392). She made supply runs to Guadalcanal from November 1942 to January, 1943. She was sunk off Kiska(58°08′N 177°38′E) on 13 June 1943 by the destroyer USS Frazier (DD-607).