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Japanese submarine Ro-116
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Japanese submarine Ro-116
Ro-116 was an Imperial Japanese Navy Ro-100-class submarine. Completed and commissioned in January 1944, she served in World War II and was sunk in May 1944 during her second war patrol.
The Ro-100 class was a medium-sized, coastal submarine derived from the preceding Kaichū type. They displaced 611 tonnes (601 long tons) surfaced and 795 tonnes (782 long tons) submerged. The submarines were 60.9 meters (199 ft 10 in) long, had a beam of 6 meters (19 ft 8 in) and a draft of 3.51 meters (11 ft 6 in). They had a double hull and a diving depth of 75 meters (246 ft).
For surface running, the boats were powered by two 500-brake-horsepower (373 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 380-horsepower (283 kW) electric motor. They could reach 14.2 knots (26.3 km/h; 16.3 mph) on the surface and 8 knots (15 km/h; 9.2 mph) underwater. On the surface, the Ro-100s had a range of 3,500 nautical miles (6,500 km; 4,000 mi) at 12 knots (22 km/h; 14 mph); submerged, they had a range of 60 nmi (110 km; 69 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 eight torpedoes. They were also armed with two single mounts for 25 mm (1 in) Type 96 anti-aircraft guns or a single 76.2 mm (3.00 in) L/40 AA gun.
Ro-116 was laid down as Submarine No. 407 on 16 January 1943 by Kawasaki at Senshu, Japan. She was renamed Ro-116 on 5 July 1943 and was attached provisionally to the Yokosuka Naval District that day. She was launched on 13 September 1943, then was towed to Kawasaki's shipyard at Kobe, Japan, for fitting-out. She was completed and commissioned at Kobe on 21 January 1944.
Upon commissioning, Ro-116 was attached formally to the Yokosuka Naval District and was assigned to Submarine Squadron 11 for workups. She called at the 3rd Fuel Depot at Tokuyama, Japan, from 28 to 29 March 1944 to refuel.
Ro-116 got underway from Japan on 31 March 1944 along with the submarine Ro-117 for her first war patrol, ordered to intercept an Allied task force operating in the vicinity of the Palau Islands. She did not find the task force, and returned to Japan on 13 April 1944.
On 4 May 1944, Ro-116 was reassigned to Submarine Division 51 in Submarine Squadron 7 in the 6th Fleet. She departed Kure, Japan, that day bound for Saipan in the Mariana Islands, which she reached on 10 May 1944.
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Japanese submarine Ro-116
Ro-116 was an Imperial Japanese Navy Ro-100-class submarine. Completed and commissioned in January 1944, she served in World War II and was sunk in May 1944 during her second war patrol.
The Ro-100 class was a medium-sized, coastal submarine derived from the preceding Kaichū type. They displaced 611 tonnes (601 long tons) surfaced and 795 tonnes (782 long tons) submerged. The submarines were 60.9 meters (199 ft 10 in) long, had a beam of 6 meters (19 ft 8 in) and a draft of 3.51 meters (11 ft 6 in). They had a double hull and a diving depth of 75 meters (246 ft).
For surface running, the boats were powered by two 500-brake-horsepower (373 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 380-horsepower (283 kW) electric motor. They could reach 14.2 knots (26.3 km/h; 16.3 mph) on the surface and 8 knots (15 km/h; 9.2 mph) underwater. On the surface, the Ro-100s had a range of 3,500 nautical miles (6,500 km; 4,000 mi) at 12 knots (22 km/h; 14 mph); submerged, they had a range of 60 nmi (110 km; 69 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 eight torpedoes. They were also armed with two single mounts for 25 mm (1 in) Type 96 anti-aircraft guns or a single 76.2 mm (3.00 in) L/40 AA gun.
Ro-116 was laid down as Submarine No. 407 on 16 January 1943 by Kawasaki at Senshu, Japan. She was renamed Ro-116 on 5 July 1943 and was attached provisionally to the Yokosuka Naval District that day. She was launched on 13 September 1943, then was towed to Kawasaki's shipyard at Kobe, Japan, for fitting-out. She was completed and commissioned at Kobe on 21 January 1944.
Upon commissioning, Ro-116 was attached formally to the Yokosuka Naval District and was assigned to Submarine Squadron 11 for workups. She called at the 3rd Fuel Depot at Tokuyama, Japan, from 28 to 29 March 1944 to refuel.
Ro-116 got underway from Japan on 31 March 1944 along with the submarine Ro-117 for her first war patrol, ordered to intercept an Allied task force operating in the vicinity of the Palau Islands. She did not find the task force, and returned to Japan on 13 April 1944.
On 4 May 1944, Ro-116 was reassigned to Submarine Division 51 in Submarine Squadron 7 in the 6th Fleet. She departed Kure, Japan, that day bound for Saipan in the Mariana Islands, which she reached on 10 May 1944.