Japanese submarine Ro-110

Ro-110 was an Imperial Japanese Navy Ro-100-class submarine. Completed and commissioned in July 1943, she served in World War II, operating in the Indian Ocean. She was sunk in February 1944 during her third war patrol.

History
Japan
Name: Submarine No. 401
Builder: Kawasaki, Kobe, Japan
Laid down: 20 August 1942
Renamed: Ro-110
Launched: 26 January 1943
Completed: 6 July 1943
Commissioned: 6 July 1943
Fate: Sunk 11 February 1944
Stricken: 30 April 1944
General characteristics
Class and type: Ro-100-class submarine
Displacement:
  • 611 tonnes (601 long tons) surfaced
  • 795 tonnes (782 long tons) submerged
Length: 60.90 m (199 ft 10 in) overall
Beam: 6.00 m (19 ft 8 in)
Draft: 3.51 m (11 ft 6 in)
Installed power:
Propulsion:
Speed:
  • 14.2 knots (26.3 km/h; 16.3 mph) surfaced
  • 8 knots (15 km/h; 9.2 mph) submerged
Range:
  • 3,500 nmi (6,500 km; 4,000 mi) at 12 knots (22 km/h; 14 mph) surfaced
  • 60 nmi (110 km; 69 mi) at 3 knots (5.6 km/h; 3.5 mph) submerged
Test depth: 75 m (246 ft)
Crew: 38
Armament:

Design and description

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).[1]

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).[2]

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.[3]

Construction and commissioning

Ro-110 was laid down as Submarine No. 401 on 20 August 1942 by the Kawasaki at Kobe, Japan.[4] She had been renamed Ro-110 by the time she was launched on 26 January 1943.[4] She was completed and commissioned on 6 July 1943.[4]

Service history

July–November 1943

Upon commissioning, Ro-110 was attached to the Sasebo Naval District.[4] She was reassigned to Submarine Squadron 11 on 10 July 1943.[4] On 10 November 1943 she was reassigned to Submarine Division 30 in Submarine Squadron 8 in the Southwest Area Fleet, and she departed Sasebo, Japan, that day and moved to Tachibana Bay on the coast of Kyushu.[4] On 12 November 1944 she got underway from Tachibana Bay bound for Penang in Japanese-occupied British Malaya, which she reached on 24 November 1943.[4]

First war patrol

On 3 December 1943, Ro-110 departed Penang to begin her first war patrol, tasked with raiding Allied shipping in the Indian Ocean.[4] She attacked an Allied convoy in the Bay of Bengal southeast of Madras, India, on 14 December 1943 with a spread of torpedoes, damaging one ship.[4] Another ship rammed her, wrecking one of her periscopes and the roof of her conning tower.[4] The damage forced her to head back to Penang, where she arrived on 19 December 1943 and her commanding officer claimed to have sunk one ship.[4]

The day Ro-110 attacked the convoy, a submarine torpedoed the British 4,807-gross register ton armed merchant ship Daisy Moller, which was on a voyage with a cargo of war materials from Bombay, India, and Colombo, Ceylon, to Visakhapatnam and Chittagong, India.[4] After Daisy Moller′s crew abandoned ship and she sank in the Indian Ocean at 16°21′N 082°13′E, the submarine surfaced, rammed the lifeboats, and machine-gunned the survivors in the water.[4] Sources disagree on the number of casualties, suggesting that 55 of Daisy Moller′s 127 crew members died in the sinking itself, but agree that only 14 crew members survived the submarine′s subsequent attack on the survivors.[4] Ro-110′s log claimed that she never surfaced during her attack on the convoy, and whether she was the submarine which attacked Daisy Moller′s survivors is a matter of controversy.[4]

Second war patrol

During her stay at Penang, Ro-110 was reassigned to Submarine Division 30 in Submarine Squadron 8 in the 6th Fleet on 1 January 1944.[4] On 2 January 1944, she put to sea to conduct her second war patrol in the Indian Ocean.[4] It was uneventful, and she returned to Penang later in January 1944.[4]

Third war patrol

Ro-110 again left Penang on 2 February 1944 to begin her third war patrol, assigned a patrol area in the Bay of Bengal.[4] After she departed Penang, the Japanese never heard from her again.[4]

Loss

On 11 February 1944,[5] Ro-110 attacked Convoy JC-36 — which was bound from Colombo, Ceylon, to Calcutta, India — in the Bay of Bengal 200 nautical miles (370 km; 230 mi) northeast of Madras.[4] She scored two torpedo hits on the British 6,274-gross register ton merchant ship Asphalion.[4] The torpedoes left six members of Asphalion′s crew missing and ten injured and flooded her No. 3 hold and engine room, crippling her.[4] Her surviving crew abandoned ship at 17°28′N 083°32′E, but she remained afloat and later was towed to port.[4]

Meanwhile, the convoy's escorts counterattacked.[4] The Royal Indian Navy sloop HMIS Jumna and the Royal Australian Navy corvettes HMAS Ipswich and HMAS Launceston gained sonar contact on Ro-110 and attacked her with depth charges.[4] Their crews subsequently observed a large amount of oil rising to the surface and heard several large underwater explosions, marking the sinking of Ro-110 at 17°25′N 083°21′E.[4]

On 15 March 1944, the Imperial Japanese Navy declared Ro-110 to be presumed lost with all 47 men on board.[4] The Japanese struck her from the Navy list on 30 April 1944.[4]

Notes
  1. Carpenter & Dorr, p. 123
  2. Chesneau, p. 204
  3. Bagnasco, p. 193
  4. Hackett, Bob; Kingsepp, Sander (2016). "IJN Submarine RO-110: Tabular Record of Movement". combinedfleet.com. Retrieved 4 October 2020.
  5. Naval History and Heritage Command Japanese Submarine Casualties in World War Two (I and RO Boats)

References
  • Bagnasco, Erminio (1977). Submarines of World War Two. Annapolis, Maryland: Naval Institute Press. ISBN 0-87021-962-6.
  • Carpenter, Dorr B. & Polmar, Norman (1986). Submarines of the Imperial Japanese Navy 1904–1945. London: Conway Maritime Press. ISBN 0-85177-396-6.
  • Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press. ISBN 0-85177-146-7.
  • Hackett, Bob; Kingsepp, Sander (2016). "IJN Submarine RO-110: Tabular Record of Movement". SENSUIKAN! Stories and Battle Histories of the IJN's Submarines. Combinedfleet.com. Retrieved 4 October 2020.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.