Japanese submarine Ro-19

Ro-19, originally named Submarine No. 36, was an Imperial Japanese Navy Kaichū-Type submarine of the Kaichū III subclass. She was commissioned in 1922 and operated in the waters of Japan. She was stricken in 1936.

History
Japan
Name: Submarine No. 36
Builder: Kure Naval Arsenal, Kure, Japan
Laid down: 9 September 1920
Launched: 28 December 1920
Completed: 15 March 1922
Commissioned: 15 March 1922
Renamed: Ro-19 on 1 November 1924
Stricken: 1 April 1936
Renamed: Haisen No. 5 on 1 April 1940
Fate:
General characteristics
Class and type: Kaichū type submarine (K3 subclass)
Displacement:
  • 752 tonnes (740 long tons) surfaced
  • 1,013 tonnes (997 long tons) submerged
Length: 70.10 m (230 ft 0 in) overall
Beam: 6.12 m (20 ft 1 in)
Draft: 3.70 m (12 ft 2 in)
Installed power:
Propulsion:
Speed:
  • 16.5 knots (30.6 km/h; 19.0 mph) surfaced
  • 8.5 knots (15.7 km/h; 9.8 mph) submerged
Range:
  • 6,000 nmi (11,000 km; 6,900 mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 85 nmi (157 km; 98 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth: 45.7 m (150 ft)
Crew: 46
Armament:

Design and description

The submarines of the Kaichu III sub-class were a slightly improved version of the preceding Kaichu II subclass, the man difference being an increase in diving depth from 30 to 45.7 meters (98 to 150 ft).[1] They displaced 752 tonnes (740 long tons) surfaced and 1,013 tonnes (997 long tons) submerged. The submarines were 70.10 meters (230 ft 0 in) long and had a beam of 6.12 meters (20 ft 1 in) and a draft of 3.70 meters (12 ft 2 in).

For surface running, the submarines were powered by two 1,450-brake-horsepower (1,081 kW) Sulzer Mark II diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 600-horsepower (447 kW) electric motor. They could reach 16.5 knots (31 km/h; 19 mph) on the surface and 8.5 knots (15.7 km/h; 9.8 mph) underwater. On the surface, they had a range of 6,000 nautical miles (11,000 km; 6,900 mi) at 10 knots (19 km/h; 12 mph); submerged, they had a range of 85 nmi (157 km; 98 mi) at 4 knots (7.4 km/h; 4.6 mph).

The submarines were armed with six 450 mm (18 in) torpedo tubes, four internal tubes in the bow and two external tubes mounted on the upper deck, and carried a total of ten Type 44 torpedoes. They were also armed with a single 76.2 mm (3.00 in) deck gun mounted aft of the conning tower.[1]

Construction and commissioning

Ro-19 was laid down as Submarine No. 36 on 9 September 1920 by the Kure Naval Arsenal at Kure, Japan.[2] Launched on 28 December 1920,[2] she was completed and commissioned on 15 March 1922.[2]

Service history

Upon commissioning, Submarine No. 36 was assigned to Submarine Division 16 in Submarine Squadron 1 in the 1st Fleet.[2] Submarine Division 16 was reassigned to Submarine Squadron 2 in the 2nd Fleet on 1 December 1922,[2] and then to the Kure Naval District — in which it remained for the rest of the submarine′s active career — on 1 December 1923.[2] In the years that followed, Submarine No. 36 was renamed Ro-19 on 1 November 1924,[2] and Submarine Division 16 served in the Kure Defense Division from 10 December 1928 to 15 November 1934.[2]

Ro-19 was stricken from the Navy list on 1 April 1936.[2] She was hulked, and on 1 April 1940 was renamed Haisen No. 5.[2] She was scrapped in 1948.[2]

Notes
  1. Gray, Randal, ed., Conway′s All the World′s Fighting Ships 1906–1921, Annapolis, Maryland: Naval Institute Press, 1985, ISBN 0 87021 907 3, p. 248.
  2. "RO-19 ex No-36". iijnsubsite.info. 2017. Retrieved 15 October 2020.

References
  • "Rekishi Gunzō"., History of Pacific War Vol.17 I-Gō Submarines, Gakken (Japan), January 1998, ISBN 4-05-601767-0
  • Rekishi Gunzō, History of Pacific War Extra, "Perfect guide, The submarines of the Imperial Japanese Forces", Gakken (Japan), March 2005, ISBN 4-05-603890-2
  • The Maru Special, Japanese Naval Vessels No.43 Japanese Submarines III, Ushio Shobō (Japan), September 1980, Book code 68343-44
  • The Maru Special, Japanese Naval Vessels No.132 Japanese Submarines I "Revised edition", Ushio Shobō (Japan), February 1988, Book code 68344-36
  • The Maru Special, Japanese Naval Vessels No.133 Japanese Submarines II "Revised edition", Ushio Shobō (Japan), March 1988, Book code 68344-37
  • The Maru Special, Japanese Naval Vessels No.135 Japanese Submarines IV, Ushio Shobō (Japan), May 1988, Book code 68344-39
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