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coastal motor boat
Photo: Francis Dodd · Wikimedia Commons · Public domain Use of this image does not imply endorsement by the U.S. Department of Defense (DoD).
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coastalmotorboat

Patrol Boats & Fast Attack Craft · United Kingdom · 1915
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coastalmotorboat

coastal motor boat
coastal motor boat Photo: Francis Dodd · Wikimedia Commons · Public domain Use of this image does not imply endorsement by the U.S. Department of Defense (DoD).
MASS (Military Archive Scoring System) 25
* Absolute score — assessed within category · no era adjustment
Speed
30
Firepower
20
Agility
40
Sensors
10
Range
20
Sea-Keeping
15
Affordability
60
Survivability
10
Versatility
30
Technology
35
Methodology ↗ → Patrol Boats & Fast Attack Craft ranking
Origin United Kingdom
CategoryPatrol Boats & Fast Attack Craft
EraWorld War I
In service1915–1919
Operators5 countries
Quantity39
⬇ Overview
⚙ Specs
⊕ History
⊕ Operators
⚖ MASS Score
📚 Sources
Data Quality88%
MASS(Military Archive Scoring System)
⊟ Patrol Boats & Fast Attack Craftranking ↗methodology ↗
25
Patrol Boats & Fast Attack Craft MASS Rating
12/15
World War I
339/387
All-Time
Patrol Boats & Fast Attack Craft · 10 axes scored
Speed
30
Firepower
20
Agility
40
Sensors
10
Range
20
Sea-Keeping
15
Affordability
60
Survivability
10
Versatility
30
Technology
35
ⓘ Regardless of era, the same scoring system applies to all units in the patrol boats & fast attack craft category.
01 / Overview
coastal motor boat
Category
Patrol Boats & Fast Attack Craft
Country
United Kingdom
Production
1915–1919
Quantity
39
Operators
5 countries
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · WORLD WAR I
12
PERFORMANCE/PRICE
94
UNIT COST (2025 USD)
—
MASS SCORE ↗
25
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 ClassificationCoastal Motor Boat
  • Ship TypePatrol Boat
  • Builder / ShipyardThornycroft, Tom Bunn, Taylor & Bates, Camper and Nicholsons, J W Brooke, Frank Maynard, Salter Bros, Wills & Packham
  • Laid Down1915
  • Launched1941
  • Commissioned1916
  • Ships in Class39
  • In ServiceYes
◈Displacement3MOD.3
  • Light Displacement5 t
  • Standard Displacement5 t
  • Full Load Displacement5.08 t
▣Dimensions3MOD.3
  • Length (overall)13.716 m
  • Beam3.353 m
  • Draft0.914 m
◇Complement1MOD.1
  • Total Complement3
◆Propulsion6MOD.6
  • Propulsion TypeOne shaft; various choices of petrol engine
  • Arrangement (CODAG/COGAG…)Single shaft
  • Number of Engines1
  • Shafts / Screws1
  • Top Speed34 kn
  • Nuclear-PoweredNo
▤Gun Armament3MOD.3
⬢Missile Armament3MOD.3
▲Underwater Warfare4MOD.4
◎Aviation5MOD.5
◈Sensors & Combat Systems3MOD.3
▣Survivability5MOD.5
◇Fleet Status6MOD.6
  • Completed39
  • Under Construction0
  • Planned55
  • Cancelled16
  • Lost16
  • Preserved1
◆Armour2MOD.2
  • Belt Armour0 mm
  • Deck Armour0 mm
03 / History
SERVICE LIFESPANRetired
  1. 1915Production started
  2. 1917First deployment: Russian Civil War
  3. 1919Production ended
111
years in service
4
years in production
39
units produced
0
countries operating
ⓘ 5 countries retired it.
04 / Operators
Operator Countries5country
ItalyRETIREDJapanRETIREDRussiaRETIREDUnited KingdomRETIREDUnited StatesRETIRED
Patrol Boats & Fast Attack Craft World War I United Kingdom John I. Thornycroft & Company
📚 Sources
📖 ENCYCLOPEDIA Browse the Patrol Boats & Fast Attack Craft entry →