W-13-class minesweeper

Class overview
No.13 in 1933
Name:	No.13 class minesweeper
Builders:	Fujinagata Shipyards Mitsui Bussan Ōsaka Iron Works
Operators:	Imperial Japanese Navy
Preceded by:	No.1-class
Succeeded by:	No.7-class
Subclasses:	No.13-class (Project Number I3A) No.17-class (Project Number I3B)
Cost:	1,330,000 JPY (in 1931)
Built:	1931 – 1936
In commission:	1933 – 1945
Planned:	6
Completed:	6
Lost:	5
Retired:	1
General characteristics No.13-class
Displacement:	525 long tons (533 t) standard
Length:	74.00 m (242 ft 9 in) overall
Beam:	8.20 m (26 ft 11 in)
Draught:	2.07 m (6 ft 9 in)
Propulsion:	2 × triple expansion stages reciprocating engines 2 × Kampon mix-fired boilers 2 shafts, 3,200 shp
Speed:	20.0 knots (23.0 mph; 37.0 km/h)
Range:	2,600 nmi (4,800 km) at 12 kn (14 mph; 22 km/h)
Complement:	98
Armament:	2 × 120 mm (4.7 in) L/45 naval guns 2 × 13 mm AA guns 18 × depth charges 2 × Type 81 depth charge projectors 2 × paravanes or 40 × Mk.5 naval mines
General characteristics No.17-class
Displacement:	578 long tons (587 t) standard
Length:	72.50 m (237 ft 10 in) overall
Beam:	7.85 m (25 ft 9 in)
Draught:	2.50 m (8 ft 2 in)
Propulsion:	2 × Kampon geared turbines 2 × Kampon mix-fired boilers 2 shafts, 3,200 shp
Speed:	19.0 knots (21.9 mph; 35.2 km/h)
Range:	2,600 nmi (4,800 km) at 12 kn (14 mph; 22 km/h)
Complement:	94
Armament:	2 × 120 mm (4.7 in) L/45 naval guns 2 × 13 mm AA guns 36 × depth charges 1 × Type 94 depth charge projector 2 × paravanes or 40 × Mk.5 naval mines

The No.13 class minesweeper (第十三号型掃海艇,, Dai Jūsan Gō-gata Sōkaitei) was a class of minesweepers of the Imperial Japanese Navy (IJN), serving during the 1930s and World War II. 6 vessels were built in 1931-36 under the Maru 1 Keikaku. They have two sub classes, this article handles them collectively.

Background

Improved model of the No.1-class. The IJN tried to a small hull than No.1-class to give a performance the same as No.1-class. And it failed by the Tomozuru Incident.

Ships in classes

No.13 class

Project number I3A. 4 vessels were built in 1931-1934. No.15 and No.16 were behind with the completed by the Tomozuru Incident. They had clipper-bow.

Ship	Builder	Laid down	Launched	Completed	Fate
No.13^[1]	Fujinagata Shipyards	22 December 1931	30 March 1933	31 August 1933	Sunk by bombardment from Netherlands pillbox at Tarakan Island on 12 January 1942. Decommissioned on 30 November 1945.
No.14	Ōsaka Iron Works	22 December 1933	20 March 1933	30 September 1933	Sunk by bombardment from Netherlands pillbox at Tarakan Island on 12 January 1942. Decommissioned on 30 November 1945.
No.15	Fujinagata Shipyards	6 April 1933	14 February 1934	21 August 1934	Heavily damaged by USS Tilefish on 5 March 1945, later agrounded. Decommissioned on 10 May 1945.
No.16	Mitsui, Tama Shipyard	20 June 1933	30 March 1934	29 September 1934	Sunk by air raid off Makassar 06°08′S 119°20′E / 6.133°S 119.333°E / -6.133; 119.333 on 11 September 1943. Decommissioned on 11 November 1943.

No.17 class

Project number I3B. 2 vessels were built in 1935-1936. Improved model of the No.13-class. About their appearance, bow was changed to double-curvature bow and fitted Kampon geared turbine.

Ship	Builder	Laid down	Launched	Completed	Fate
No.17	Ōsaka Iron Works	28 January 1935	3 August 1935	15 January 1936	Decommissioned on 20 November 1945. Scrapped on 1 September 1948.
No.18	Mitsui, Tama Shipyard	2 February 1935	19 September 1935	30 April 1936	Sunk by air raid off Hainan 16°52′N 108°38′E / 16.867°N 108.633°E / 16.867; 108.633 on 26 November 1944. Decommissioned on 10 January 1945.

Photo

No.16
No.18

Footnotes

↑ Minesweeper No.13 (第十三号掃海艇, Dai 13 Gō Sōkaitei). The same shall apply hereinafter.

Bibliography

Ships of the World special issue Vol.45, Escort Vessels of the Imperial Japanese Navy, "Kaijinsha". , (Japan), February 1996
The Maru Special, Japanese Naval Vessels No.50, Japanese minesweepers and landing ships, "Ushio Shobō". (Japan), April 1981

Japanese auxiliary ship classes of World War II

Colliers and oilers	Notoro Ondo Sunosaki Ashizuri Kazahaya^S Hayasui^S Hario^S Muroto Teiyō Maru^S Ōse (ex-Dutch tanker Genota)^SC

Food supply ships	Mamiya^S Nosaki^S Kinesaki Irako^S Kurasaki^SC

Landing ships	No.1 No.101 Shinshū Maru^S (Army) SS (Army)

Armed merchant cruisers	Aikoku Maru^S Kongō Maru^S Noshiro Maru^S

Minelayers and cable layer	Tokiwa^SC Itsukushima^S Yaeyama^S Okinoshima^S Tsugaru^S Minoo^SC Shirataka^S Hatsutaka Tsubame Natsushima (1933) Sokuten (1938) Hirashima Ajiro^S Kamishima Hashima Sokuten (1913) Aux. No.1 Aux. No.101 (ex-HMS Barlight)^SC

Minesweepers	No.1 (1923) No.5 (1928) No.13 No.17 No.7 (1938) No.19 No.101 (ex-HMS Taitam and HMS Waglan)^C Aux. No.1 Aux. No.101 (ex-HNLMS DEFG-class) Aux. No.104 (ex-HNLMS DEFG-class)

Patrol boats	No.1^C No.31^C No.46^SC No.101 (ex-HMS Thracian)^SC No.102 (ex-USS Stewart)^SC No.103 (ex-USS Finch)^SC No.104 (ex-Dutch East Indies Valk and Arend)^C No.105 (ex-Philippine customs Arayat)^SC No.106 (ex-HNLMS Banckert (1929))^SCI No.107 (ex-USS Genesee)^SC No.109 (ex-Dutch East Indies Fazant)^SC Aux. No.1

Repair ships	Asahi^SC Akashi^S Hayase (ex-Chinese passenger Chin Kiang)^SC Hitonose (ex-ROCN Min Sheng)^SC

Seaplane tenders	Notoro Kamoi^SC Chitose Mizuho^S Nisshin^S Akitsushima^S Kamikawa Maru

Submarine chasers	No.1 No.3^S No.4 No.13 No.28 No.60 Aux. No.1 Aux. No.101 (ex-HNLMS Tjerimai)^SC Aux. No.102 (ex-HNLMS Ardjoeno class)^C Aux. No.103 (ex-HNLMS B1 class)^C Aux. No.111 (ex-HNLMS P13 or P14)^SC Aux. No.112 (ex-HNLMS A class)^C Aux. No.117 (ex-HNLMS Bantam)^C Aux. No.251 Aux. No.253^S

Submarine tenders	Komahashi^SC Jingei Taigei^S

Survey ships	Tsukushi^S Katsuriki^SC Hakusa (ex-China customs Fu Hsing)^SC

Target ships	Settsu^SC Yakaze^SC Hakachi^S Ōhama^S

Training ships	Fuji^SC Shikishima^SC Asama^SC Azuma^SC Kasuga^SC Atada (ex-ROCN Yat Sen)^SC

Others	Sōya (freighter)^SC Kashino (turret transporter)^S Ōtomari (icebreaker)^S Tategami (salvage tug) Kasashima (salvage tug) Miura (salvage tug) Kaiyō No.1 (oceanographic research ship) Asuka (traffic ship, ex-ROCN Yung Chien)^SC

S Single ship of class C Converted to ship type I Incomplete until the end of war

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