Data Quality88%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the patrol boats & fast attack craft category.
01 / Overview
steam gun boat
Category
Country
Production
1941–1942
Quantity
7
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · WORLD WAR II
17
PERFORMANCE/PRICE
76
UNIT COST (2025 USD)
—
ⓘ Performance/Price and MASS score are computed across all units in the patrol boats & fast attack craft category, regardless of era.
02 / Specs & Design
◎Identification7MOD.7
- Hull ClassificationSteam gun boat (SGB)
- Ship Typegunboat
- Builder / ShipyardYarrow Shipbuilders, Hawthorn Leslie, J. Samuel White, William Denny and Brothers
- Laid Down1940
- Commissioned1941
- Ships in Class9
- In ServiceYes
◈Displacement3MOD.3
- Light Displacement175 t
- Standard Displacement175 t
- Full Load Displacement255 t
▣Dimensions3MOD.3
- Length (overall)44.3 m
- Beam6.1 m
- Draft1.68 m
◇Complement3MOD.3
- Total Complement34
- Officers3
- Air Wing Personnel0
◆Propulsion9MOD.9
- Propulsion Type*1 × LaMont boiler *2 × Metropolitan-Vickers geared Steam turbines *2 × shafts
- Arrangement (CODAG/COGAG…)2 shafts
- Number of Engines2
- Shaft Power5,965 kW
- Shafts / Screws2
- Top Speed35 kn
- Cruise Speed12 kn
- Range200
- Nuclear-PoweredNo
▤Gun Armament4MOD.4
- Main Gun3-inch (76.2 mm)
- Main Gun Calibre76.2 mm
- Main Gun Count1
- Secondary Guns6-pdr guns, Oerlikon 20 mm cannon
⬢Missile Armament4MOD.4
▲Underwater Warfare4MOD.4
- Torpedo Tubes2
- ASW CapabilityNo
- Hull-Mounted SonarNo
- Towed Array SonarNo
◎Aviation5MOD.5
- Embarked Helicopters0
- HangarNo
- Flight DeckNo
- Fixed-Wing Aircraft0
- UAV CapabilityNo
◈Sensors & Combat Systems3MOD.3
▣Survivability5MOD.5
- CBRN CitadelNo
- DegaussingNo
- Hull Materialsteel
- Stealth ShapingNo
- Automated Damage ControlNo
◇Fleet Status7MOD.7
- Completed7
- Active0
- Under Construction0
- Planned52
- Cancelled2
- Lost1
- Preserved0
◆Armour1MOD.1
- Armour18 mm protective plate over boiler and engine rooms
03 / History
SERVICE LIFESPANStill in Service
- 1939First deployment: World War II
- 1941Production started
- 1942Production ended
85
years in service
1
years in production
7
units produced
1
countries operating
ⓘ The producing country still actively operates it. 5 countries retired it.
04 / Operators
Operator Countries6country
05 / MASS Score
PATROL BOATS & FAST ATTACK CRAFT RANKING Patrol Boats & Fast Attack Craft · World War II
MASS RANKINGSMASS ↗
165PATROL BOATS & FAST ATTACK CRAFT17WORLD WAR II · PATROL BOATS & FAST ATTACK CRAFT587UNITED KINGDOM · ALL WEAPONS235PERFORMANCE/PRICE · PATROL BOATS & FAST ATTACK CRAFT
ⓘ Rankings are within thePatrol Boats & Fast Attack Craftcategory.
📚 Sources