W-13-class minesweeper

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.

No.13 in 1933
Class overview
Name: No.13 class minesweeper
Builders:
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:
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:

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 this attempt failed when the vessels were discovered to be top heavy by an investigation of the fleet in the aftermath of 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 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 on 26 November 1944. Decommissioned on 10 January 1945.

Photo
  • No.16
  • No.18

Footnotes
  1. 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

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