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
Ham-class inshore minesweeper
Country
Production
1954–1959
Quantity
93
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
MINE COUNTERMEASURES VESSELS (MCM) · EARLY COLD WAR
31
PERFORMANCE/PRICE
87
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
◎Identification6MOD.6
- Hull Classificationwood and non-ferrous metal composite (26-group) or all-wood (27-group)
- Ship Typeinshore minesweeper
- BuilderJ. Samuel White
- Ships in Class93
- Rolelocate and neutralise individual mines in shallow waters
- In ServiceYes
◈Displacement & Dimensions5MOD.5
- Light Displacement120 t
- Full Load Displacement121.92 t
- Length32.5 m
- Beam6.4 m
- Draft1.7 m
▣Capacity3MOD.3
- Well DeckNo
- Landing Craft Carried0
- Ro-Ro CapabilityNo
◇Propulsion4MOD.4
- Propulsion Typediesel
- Shaft Power1,100 kW
- Top Speed14 kn
- Complement (crew)15
◆Aviation4MOD.4
- Embarked Helicopters0
- HangarNo
- Flight DeckNo
- Fixed-Wing / VSTOL0
▤Self-Defense3MOD.3
- Main GunBofors 40 mm L/60 or Oerlikon 20 mm
- Electronic WarfareNo
- Decoy LaunchersNo
⬢Fleet Status3MOD.3
- Completed93
- Under Construction0
- Cancelled0
▲Armour3MOD.3
- Armournone
- Belt Armour0 mm
- Deck Armour0 mm
03 / History
SERVICE LIFESPANStill in Service
- 1954Production started
- 1959Production ended
72
years in service
5
years in production
93
units produced
9
countries operating
ⓘ The producing country still actively operates it.
04 / Operators
Operator Countries9country
05 / MASS Score
MINE COUNTERMEASURES VESSELS (MCM) RANKING Mine Countermeasures Vessels (MCM) · Early Cold War
MASS RANKINGSMASS ↗
122MINE COUNTERMEASURES VESSELS (MCM)31EARLY COLD WAR · MINE COUNTERMEASURES VESSELS (MCM)816UNITED KINGDOM · ALL WEAPONS28PERFORMANCE/PRICE · MINE COUNTERMEASURES VESSELS (MCM)
ⓘ Rankings are within theMine Countermeasures Vessels (MCM)category.
📚 Sources