Data Quality88%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the mine countermeasures vessels (mcm) category.
01 / Overview
Castle-class naval trawler
Country
Prime contractor
Production
1916–1919
Quantity
197
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
MINE COUNTERMEASURES VESSELS (MCM) · WORLD WAR I
6
PERFORMANCE/PRICE
94
UNIT COST (2025 USD)
—
ⓘ Performance/Price and MASS score are computed across all units in the mine countermeasures vessels (mcm) category, regardless of era.
02 / Specs & Design
◎Identification4MOD.4
- Ship Typeminesweeper/naval trawler
- Commissioned1917
- Ships in Class197
- Rolepatrol, anti-submarine warfare, minesweeping
◈Displacement & Dimensions5MOD.5
- Light Displacement360 t
- Full Load Displacement285 t
- Length38.3 m
- Beam7.17 m
- Draft3.87 m
▣Propulsion3MOD.3
- Propulsion Type1 vertical triple expansion reciprocating engine, 1 boiler, 1 shaft
- Top Speed10.5 kn
- Complement (crew)15
◇Self-Defense2MOD.2
- Main GunQF 12-pounder 12 cwt naval gun
- Electronic WarfareNo
◆Fleet Status2MOD.2
- Completed280
- Lost20
03 / History
SERVICE LIFESPANRetired
- 1914First deployment: World War I
- 1916Production started
- 1919Production ended
- 1940Sale: New Zealand (13 units)
110
years in service
3
years in production
197
units produced
0
countries operating
ⓘ 3 countries retired it.
04 / Operators
Operator Countries3country
Castle-class naval trawlerSALES3records
| Year | Buyer | Quantity | Amount | Present Value (2025) |
|---|---|---|---|---|
| 1940 |  New Zealand | 13 | — | — |
| — |  Canada | 60 | — | — |
| — |  United States | — | — | — |
ⓘ "Present Value" is an estimated amount adjusted for inflation.
05 / MASS Score
MINE COUNTERMEASURES VESSELS (MCM) RANKING Mine Countermeasures Vessels (MCM) · World War I
MASS RANKINGSMASS ↗
158MINE COUNTERMEASURES VESSELS (MCM)6WORLD WAR I · MINE COUNTERMEASURES VESSELS (MCM)1013UNITED KINGDOM · ALL WEAPONS1PERFORMANCE/PRICE · MINE COUNTERMEASURES VESSELS (MCM)
ⓘ Rankings are within theMine Countermeasures Vessels (MCM)category.
📚 Sources