Data Quality87%
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
J-class torpedo boat
Category
Country
Production
1939–1939
Quantity
4
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · WORLD WAR II
7
PERFORMANCE/PRICE
44
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 ClassificationMotor torpedo boat
- Ship TypeJymy class motor torpedo boat
- Builder / ShipyardCantieri Baglietto
- Launched1938
- Commissioned1939
- Ships in Class4
- In ServiceNo
◈Displacement2MOD.2
- Light Displacement25 t
- Full Load Displacement25 t
▣Dimensions3MOD.3
- Length (overall)18.7 m
- Beam4.7 m
- Draft1.5 m
◇Complement1MOD.1
- Total Complement10
◆Propulsion8MOD.8
- Propulsion Typepetrol engines
- Arrangement (CODAG/COGAG…)2 × Isotta‑Fraschini petrol engines
- Number of Engines2
- Shaft Power1,490 kW
- Shafts / Screws2
- Top Speed42 kn
- Range1,100
- Nuclear-PoweredNo
▤Gun Armament4MOD.4
- Main Gun20 mm Breda gun
- Main Gun Calibre20 mm
- Main Gun Count1
- Secondary Guns12.7 mm machine gun
⬢Missile Armament3MOD.3
▲Underwater Warfare4MOD.4
- Torpedo Tubes2
- ASW CapabilityNo
- Hull-Mounted SonarNo
- Towed Array SonarNo
◎Aviation3MOD.3
◈Sensors & Combat Systems3MOD.3
▣Survivability4MOD.4
◇Fleet Status2MOD.2
- Completed4
- Retired4
03 / History
SERVICE LIFESPANStill in Service
- 1939Production started
- 1943Sale: Finland (4 units)
87
years in service
0
years in production
4
units produced
1
countries operating
ⓘ The producing country still actively operates it. 1 countries retired it.
04 / Operators
Operator Countries2country
J-class torpedo boatSALES1records
| Year | Buyer | Quantity | Amount | Present Value (2025) |
|---|---|---|---|---|
| 1943 |  Finland | 4 | — | — |
ⓘ "Present Value" is an estimated amount adjusted for inflation.
05 / MASS Score
PATROL BOATS & FAST ATTACK CRAFT RANKING Patrol Boats & Fast Attack Craft · World War II
MASS RANKINGSMASS ↗
120PATROL BOATS & FAST ATTACK CRAFT7WORLD WAR II · PATROL BOATS & FAST ATTACK CRAFT71FINLAND · ALL WEAPONS341PERFORMANCE/PRICE · PATROL BOATS & FAST ATTACK CRAFT
ⓘ Rankings are within thePatrol Boats & Fast Attack Craftcategory.
📚 Sources