Data Quality84%
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
Defender-class torpedo boat
Category
Country
Production
1883–1883
Quantity
4
Unit Price (current)
$538.4K↗ 3362% inflation · 1883→2025
Original Price
$15.6K (1883)
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
PATROL BOATS & FAST ATTACK CRAFT · PRE-WWI / INDUSTRIAL AGE
70
PERFORMANCE/PRICE
68
UNIT COST (2025 USD)
$538.4K
Original: $15.6K (1883)
Inflation: +%3362
ⓘ 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 Classificationtorpedo boat
- Ship Typetorpedo boat
- Builder / ShipyardJohn I. Thornycroft & Company
- Laid Down1883
- Launched1883
- Commissioned1884
- Ships in Class4
- In ServiceNo
◈Displacement1MOD.1
- Full Load Displacement12 t
▣Dimensions2MOD.2
- Length (overall)19.15 m
- Beam2.29 m
◇Complement1MOD.1
- Total Complement7
◆Propulsion7MOD.7
- Propulsion Type*Two-cylinder inverted compound-expansion steam reciprocating engine *130lb/sq in Locomotive boiler,
- Arrangement (CODAG/COGAG…)reciprocating engine
- Number of Engines1
- Shaft Power129 kW
- Shafts / Screws1
- Top Speed17.5 kn
- Nuclear-PoweredNo
▤Gun Armament2MOD.2
- Main GunNordenfelt gun
- Main Gun Count1
⬢Missile Armament1MOD.1
- Anti-Ship MissilesWhitehead torpedo
▲Underwater Warfare3MOD.3
- Torpedo Tubes2
- ASW CapabilityNo
- Hull-Mounted SonarNo
◎Aviation1MOD.1
◈Survivability1MOD.1
- Hull Materialsteel
▣Fleet Status3MOD.3
- Completed4
- Retired4
- Preserved1
03 / History
SERVICE LIFESPANRetired
- 1883Production started
143
years in service
0
years in production
4
units produced
0
countries operating
ⓘ 1 countries retired it.
04 / Operators
Operator Countries1country
Defender-class torpedo boatSALES1records
| Year | Buyer | Quantity | Amount | Present Value (2025) |
|---|---|---|---|---|
| — |  New Zealand | 4 | $62 B | $62 B |
ⓘ "Present Value" is an estimated amount adjusted for inflation.
05 / MASS Score
PATROL BOATS & FAST ATTACK CRAFT RANKING Patrol Boats & Fast Attack Craft · Pre-WWI / Industrial Age
MASS RANKINGSMASS ↗
314PATROL BOATS & FAST ATTACK CRAFT70PRE-WWI / INDUSTRIAL AGE · PATROL BOATS & FAST ATTACK CRAFT932UNITED KINGDOM · ALL WEAPONS12PRICE · PATROL BOATS & FAST ATTACK CRAFT720PRICE · ALL WEAPONS302PERFORMANCE/PRICE · PATROL BOATS & FAST ATTACK CRAFT
ⓘ Rankings are within thePatrol Boats & Fast Attack Craftcategory.
📚 Sources