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No.1-class torpedo boat
Photo: USN · Wikimedia Commons · Public domain
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No.1-classtorpedoboat

Patrol Boats & Fast Attack Craft · Japan · 1939
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No.1-classtorpedoboat

No.1-class torpedo boat
No.1-class torpedo boat Photo: USN · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Speed
60
Firepower
40
Agility
75
Sensors
30
Range
50
Sea-Keeping
45
Affordability
80
Survivability
35
Versatility
55
Technology
20
Origin Japan
ManufacturerYarrow Shipbuilders Limited
CategoryPatrol Boats & Fast Attack Craft
EraWorld War II
In service1939–1944
Operators1 countries
Quantity23
Data Quality84%
48
Patrol Boats & Fast Attack Craft MASS Rating
9/31
World War II
130/387
All-Time
Patrol Boats & Fast Attack Craft · 10 axes scored
Speed
60
Firepower
40
Agility
75
Sensors
30
Range
50
Sea-Keeping
45
Affordability
80
Survivability
35
Versatility
55
Technology
20
ⓘ Regardless of era, the same scoring system applies to all units in the patrol boats & fast attack craft category.
01 / Overview
No.1-class torpedo boat
Country
Production
1939–1944
Quantity
23
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · WORLD WAR II
9
PERFORMANCE/PRICE
78
UNIT COST (2025 USD)
—
48
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
◎Identification4MOD.4
  • Laid Down1939
  • Launched1940
  • Commissioned1940
  • Ships in Class23
◈Displacement1MOD.1
  • Light Displacement120 t
▣Dimensions3MOD.3
  • Length (overall)45 m
  • Beam5.5 m
  • Draft1.8 m
◇Complement1MOD.1
  • Total Complement30
◆Propulsion6MOD.6
  • Propulsion Typediesel engines with reduction gears
  • Number of Engines2
  • Shaft Power7,200 kW
  • Shafts / Screws2
  • Top Speed38 kn
  • Range1,000
▤Gun Armament2MOD.2
  • Main Gun Calibre127 mm
  • Main Gun Count2
⬢Missile Armament1MOD.1
▲Underwater Warfare4MOD.4
◎Sensors & Combat Systems3MOD.3
◈Survivability4MOD.4
03 / History
SERVICE LIFESPANStill in Service
  1. 1939Production started
  2. 1944Production ended
87
years in service
5
years in production
23
units produced
1
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Countries1country
📖 TERMS ON THIS PAGE4terms
Anti-Submarine Warfare. Capability to detect, track, and engage submarines.
Automated Damage Control is a shipboard system that detects, assesses, and mitigates combat damage on aircraft carriers using sensors and software to enhance response speed and reduce crew workload.
A technique to reduce a ship's magnetic signature by neutralizing its internal magnetic field, minimizing vulnerability to magnetic mines or detection.
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 →