Japanese submarine Ro-16

	Ro-16 during the 1920s, sometime after her name was changed from Submarine No. 37 to Ro-16 on 1 November 1924.
History
Japan
Name	Submarine No. 37
Builder	Kure Naval Arsenal, Kure, Japan
Laid down	18 November 1920
Launched	22 April 1921
Completed	29 April 1922
Commissioned	29 April 1922
Renamed	Ro-16 on 1 November 1924
Stricken	1 September 1933
Fate	Hulked 1934
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	2,900 bhp (2,200 kW) (diesel); 1,200 hp (890 kW) (electric motor);
Propulsion	Diesel-electric; 2 × Sulzer Mark II diesel engine, 75 tons fuel; 2 × electric motor; 2 x shafts;
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	6 × 450 mm (18 in) torpedo tubes (4 x bow, 2 x external on upper deck); 10 x Type 44 torpedoes; 1 × 76.2 mm (3.00 in) gun;

Ro-16, originally named Submarine No. 37, 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 1933.

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-16 was laid down as Submarine No. 37 on 18 November 1920 by the Kure Naval Arsenal at Kure, Japan.[2] Launched on 22 April 1921,[2] she was completed and commissioned on 29 April 1922.[2]

Service history

Upon commissioning, Submarine No. 37 was attached to the Kure Naval District, to which she remained attached throughout her career.[2] She was assigned to Submarine Division 15 — in which she spent the rest of her career — on 15 May 1922.[2] Submarine Division 15 served in the Kure Defense Division from 1 December 1922 to 1 December 1923.[2] Submarine No. 37 was renamed Ro-16 on 1 November 1924,[2] and on 1 December 1926 Submarine Division 15 began another assignment to the Kure Defense Division that lasted through the end of Ro-16′s active service.[2]

Ro-16 was stricken from the Navy list on 1 September 1933.[2] In 1934, her hulk was transferred to the Ehime Prefectural Yuge Commercial Ship School, later renamed the Yuge National College of Maritime Technology, at Yuge, Ehime, Japan.

Notes

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.
"RO-16 ex No-37". 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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[gray-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.

[ijnsubsiteRo16-2] "RO-16 ex No-37". iijnsubsite.info. 2017. Retrieved 15 October 2020.

Kaichū type submarine
Ro-11-class (Type K1)	Ro-11 Ro-12
Ro-13-class (Type K2)	Ro-13 Ro-14 Ro-15
Ro-16-class (Type K3)	Ro-16 Ro-17 Ro-18 Ro-19 Ro-20 Ro-21 Ro-22 Ro-23 Ro-24 Ro-25
Ro-26-class (Type K4)	Ro-26 Ro-27 Ro-28
Ro-29-class (Toku-Chū/Type K5)	Ro-29 Ro-30 Ro-31 Ro-32
Ro-33-class (Type K6)	Ro-33 Ro-34
Ro-35-class (Sen-Chū/Type K7)	Ro-35 Ro-36 Ro-37 Ro-38 Ro-39 Ro-40 Ro-41 Ro-42 Ro-43 Ro-44 Ro-45 Ro-46 Ro-47 Ro-48 Ro-49 Ro-50 Ro-55 Ro-56
Preceded by: Type L submarine Followed by: Ko type submarine Imperial Japanese Navy submarines