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No.1-class submarine chaser
Photo: Imperial Japanese Navy · Wikimedia Commons · Public domain
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No.1-classsubmarinechaser

Patrol Boats & Fast Attack Craft · Japan · 1933
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No.1-classsubmarinechaser

No.1-class submarine chaser
No.1-class submarine chaser Photo: Imperial Japanese Navy · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Speed
40
Firepower
30
Agility
60
Sensors
20
Range
45
Sea-Keeping
50
Affordability
80
Survivability
35
Versatility
40
Technology
25
Origin Japan
CategoryPatrol Boats & Fast Attack Craft
EraInterwar Period
In service1933–1936
Operators1 countries
Quantity3
Data Quality85%
40
Patrol Boats & Fast Attack Craft MASS Rating
14/33
Interwar Period
170/387
All-Time
Patrol Boats & Fast Attack Craft · 10 axes scored
Speed
40
Firepower
30
Agility
60
Sensors
20
Range
45
Sea-Keeping
50
Affordability
80
Survivability
35
Versatility
40
Technology
25
ⓘ Regardless of era, the same scoring system applies to all units in the patrol boats & fast attack craft category.
01 / Overview
No.1-class submarine chaser
Country
Production
1933–1936
Quantity
3
Unit Price (current)
$247.6K↗ 2376% inflation · 1933→2025
Original Price
$10.0K (1933)
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · INTERWAR PERIOD
14
PERFORMANCE/PRICE
78
UNIT COST (2025 USD)
$247.6K
Original: $10.0K (1933)
Inflation: +%2376
40
patrol boats & fast attack craft category
ⓘ Performance/Price and MASS score are computed across all units in the patrol boats & fast attack craft category, regardless of era.
02 / Specs & Design
◎Identification8MOD.8
  • Hull Classificationsubmarine chaser
  • Ship Typesubmarine chaser
  • Builder / ShipyardUraga Dock Company, IHI Corporation, Universal Shipbuilding Corporation
  • Laid Down1933
  • Launched1933
  • Commissioned1934
  • Ships in Class3
  • In ServiceYes
◈Displacement2MOD.2
  • Standard Displacement266 t
  • Full Load Displacement377 t
▣Dimensions4MOD.4
  • Length (overall)65.3 m
  • Length (waterline)64 m
  • Beam5.9 m
  • Draft1.43 m
◇Complement1MOD.1
  • Total Complement65
◆Propulsion7MOD.7
  • Propulsion Typediesel
  • Arrangement (CODAG/COGAG…)2 shafts
  • Number of Engines2
  • Shaft Power2,535 kW
  • Shafts / Screws2
  • Top Speed24 kn
  • Range1,500
▤Gun Armament3MOD.3
  • Main Gun40 mm heavy machine gun
  • Main Gun Calibre40 mm
  • Main Gun Count2
⬢Underwater Warfare3MOD.3
▲Survivability1MOD.1
  • Hull Materialsteel
◎Fleet Status3MOD.3
  • Completed3
  • Lost1
  • Retired2
◈Armour1MOD.1
  • Armour}}
03 / History
SERVICE LIFESPANStill in Service
  1. 1933Production started
  2. 1936Production ended
  3. 1939First deployment: World War II
93
years in service
3
years in production
3
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Countries1country
📖 TERMS ON THIS PAGE2terms
Anti-Submarine Warfare. Capability to detect, track, and engage submarines.
Sonar system installed on the hull of a ship, used for underwater detection and navigation by emitting and receiving sound waves.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Patrol Boats & Fast Attack Craft entry →