No.1 class submarine chaser

No.1 class submarine chaser
IJN PC1class-1938.jpg
(left to right) No.1, No.2 and No.3 in 1938
Class overview
Name: No.1 class submarine chasers
No.1 class
No.3 class
Builders: Uraga Dock Company
Tōkyō Ishikawajima Shipyard
Asano Shipyard
Operators: Naval Ensign of Japan.svg Imperial Japanese Navy
Succeeded by: No.4 class
Cost: 1,525,700 JPY (No.1 class)
1,530,000 JPY (No.3 class)
Built: 1933 – 1936
In commission: 1934 – 1946
Planned: 3
Completed: 3
Lost: 1
Retired: 2
General characteristics No.1 class
Displacement: 266 long tons (270 t) standard
280 long tons (284 t) trial
and after late 1934
377 long tons (383 t) trial
Length: 65.30 m (214 ft 3 in) overall
64.00 m (210 ft 0 in) waterline
Beam: 5.90 m (19 ft 4 in)
Draught: 1.43 m (4 ft 8 in)
Propulsion: 2 × Kampon Mk.22 Model 8 diesels
2 shafts, 3,400 bhp
Speed: 24.0 knots (27.6 mph; 44.4 km/h)
and after late 1934
21.1 knots (24.3 mph; 39.1 km/h)
Range: 1,500 nmi (2,800 km) at 14 kn (16 mph; 26 km/h)
Complement: 65
Armament: • 2 × 40 mm heavy machine guns
• 36 × depth charges
• 1 × depth charge thrower
• 1 × Type 93 active sonar
• 1 × MV hydrophone
General characteristics No.3 class
Displacement: 270 long tons (274 t) standard
285 long tons (290 t) trial
Length: 56.10 m (184 ft 1 in) overall
55.00 m (180 ft 5 in) waterline
Beam: 5.60 m (18 ft 4 in)
Draught: 2.10 m (6 ft 11 in)
Propulsion: 2 × Kampon Mk.22 Model 6 diesels
2 shafts, 2,500 bhp
Speed: 20.0 knots (23.0 mph; 37.0 km/h)
Range: 1,500 nmi (2,800 km) at 14 kn (16 mph; 26 km/h)
Complement: 60
Armament: • 2 × 40 mm heavy machine guns
• 36 × depth charges
• 2 × Type 94 depth charge projectors
• 1 × depth charge thrower
• 1 × French SCAM active sonar
• 1 × Type 93 hydrophone

The No.1 class submarine chaser (第一号型駆潜艇, Dai 1 Gō-gata Kusentei?) was a class of submarine chasers of the Imperial Japanese Navy (IJN), serving during World War II. 3 vessels were built in 1933-36 under the Maru 1 Programme and the Maru 2 Programme. They have two sub classes, this article handles them collectively.

Contents

Background

  • In World War I, German U-boat raged. The IJN began maintenance of an anti-submarine boat as a lesson in this, because Japanese shoreline and sea-lanes were very long. The IJN had some submarine chaser type tugboats and yard ferries. However, they were small and their speed was low.
  • The IJN wanted to give the anti-submarine boats a speed of more than 20 knots, because their Kaidai III submarine already achieved a 20kt surfaced.

Design

  • The Naval Technical Department (Kampon) made draft shallow to give them high speed. They achieved 24 kt speed hereby.
  • The No.1 and the No.2 were completed in March 1934, and they were assigned to the 1st Subchaser Division, Yokosuka Naval Defence Squadron.
  • However, because of their very shallow draft they lacked the rolling performance. This fact become evident after the Tomozuru incident.
  • The Tomozuru incident affected the No.1 class. The No.1 and the No.2 were sent to the Uraga Dock Company in July 1934, and repairs were started. They were equipped 80 tons ballast and mounted a ballast keel. The drawings for the No.3 type boats were also revised.

Service

  • Late 1934, Repairs were completed.
  • October 1936, The No.3 assigned to 1st SchDiv. They always shared an action afterward.
  • In 1938, the 1st SchDiv was transferred to the No.1 Base Force (Shanghai).
  • On 5 September 1941, the No.1 Base Force was transferred to the 2nd Fleet.
  • In December 1941 – March 1942, the 1st SchDiv engaged to the Battle of the Philippines and Dutch East Indies campaign.
  • On 10 March 1942, the 1st SchDiv was transferred to the No.21 Special Base Force (Surabaya), 2nd Southern Expeditionary Fleet, Southwest Area Fleet.
  • On 1 May 1942: The 1st SchDiv was dissolved. They spent all their time for escort operations in the Java Area.

Ships in classes

No.1 class

  • Project number was K3. 2 vessels were built under the Maru 1 Programme. They equipped the MV hydrophone by Submarine signal company and latest active sonar the Type 93.
Ship Builder Laid down Launched Completed Fate
Royal Navy off Singapore on 11 July 1946. Decommissioned on 10 August 1946.
Lombok on 27 June 1945.

No.3 class

  • Project number was K4. Only 1 vessel was built under the Maru 2 Programme. They equipped the Frech SCAM active sonar and latest hydrophone the Type 93. The No.3 was classed in the No.1 class in the IJN official documents.
Ship Builder Laid down Launched Completed Fate
edit] Photos

Footnotes

  1. ^ Submairne chaser No.1 (第1号駆潜艇 Dai 1 Gō Kusentei?). The same shall apply hereinafter.

Bibliography


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