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I-class destroyer
Photo: Royal Navy official photographer · Wikimedia Commons · Public domain
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I-classdestroyer

Destroyers · United Kingdom · 1937
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I-classdestroyer

I-class destroyer
I-class destroyer Photo: Royal Navy official photographer · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Firepower
60
Air Defence
45
ASW Capability
30
Sensors
50
Survivability
65
Versatility
70
Endurance
75
Aviation
0
Technology
55
Cost-Effectiveness
80
Origin United Kingdom
ManufacturerJohn Brown & Company, Cammell Laird, Vickers-Armstrongs, R. & W. Hawthorn, Leslie and Company, J. Samuel White, Yarrow Shipbuilders Limited
CategoryDestroyers
EraInterwar Period
In service1937–1939
Operators2 countries
Quantity13
Data Quality86%
MASS(Military Archive Scoring System)
52
Destroyers MASS Rating
28/85
Interwar Period
180/478
All-Time
Destroyers · 10 axes scored
Firepower
60
Air Defence
45
ASW Capability
30
Sensors
50
Survivability
65
Versatility
70
Endurance
75
Aviation
0
Technology
55
Cost-Effectiveness
80
ⓘ Regardless of era, the same scoring system applies to all units in the destroyers category.
01 / Overview
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
DESTROYERS · INTERWAR PERIOD
28
PERFORMANCE/PRICE
87
UNIT COST (2025 USD)
—
52
destroyers category
ⓘ Performance/Price and MASS score are computed across all units in the destroyers category, regardless of era.
02 / Specs & Design
◎Identification7MOD.7
  • Hull ClassificationDestroyer
  • Ship TypeI-class destroyer
  • Laid Down1936
  • Launched1936
  • Commissioned1937
  • Ships in Class11
  • In ServiceYes
◈Displacement2MOD.2
  • Standard Displacement1,370 t
  • Full Load Displacement1,391.92 t
▣Dimensions3MOD.3
  • Length (overall)98 m
  • Beam10 m
  • Draft4 m
◇Complement1MOD.1
  • Total Complement137
◆Propulsion5MOD.5
  • PropulsionSteam Turbine
  • Shaft Power25,350 kW
  • Shafts / Screws2
  • Top Speed36 kn
  • Range5,530
▤Gun Armament2MOD.2
  • Main Gun4 × 4.7-inch (120 mm) Mk IX guns
  • Secondary Guns2 × 0.5 in (12.7 mm) machine guns
⬢Underwater Warfare3MOD.3
▲Sensors & Combat Systems3MOD.3
◎Survivability1MOD.1
03 / History
SERVICE LIFESPANStill in Service
  1. 1936Entered service
  2. 1937Production started
  3. 1939First deployment: World War II
89
years in service
2
years in production
13
units produced
2
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Inventory1country · 12units
12active
📖 TERMS ON THIS PAGE5terms
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.
Military action involving the use of electromagnetic spectrum to disrupt, deceive, or destroy enemy electronic systems.
Sonar system installed on the hull of a ship, used for underwater detection and navigation by emitting and receiving sound waves.
A mechanical device that converts steam pressure into rotational energy, used to drive shipboard generators or propulsion systems.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Destroyers entry →