Combat envelope
Range and detection
Every bar uses the same 10 km scale. Surface detection is a visibility threshold, not a weapon range.
Ship Database
Tier VIII
Submarine
Premium
United Kingdom
Alliance
The Amphion-class submarines were designed for use in the Pacific. In contrast to their predecessors, they boasted greater surface speed and improved living conditions for their crew. They were of a double-hull design, with the torpedo tubes distributed evenly between the bow and stern. These submarines were built on the basis of technical solutions...
Read full ship history
The Amphion-class submarines were designed for use in the Pacific. In contrast to their predecessors, they boasted greater surface speed and improved living conditions for their crew. They were of a double-hull design, with the torpedo tubes distributed evenly between the bow and stern. These submarines were built on the basis of technical solutions tested on the preceding T-class ships—specifically, by using an all-welded inner pressure hull. Since 1981, HMS Alliance has been a memorial and museum ship at Gosport.
- Doubloons
- 11,000
At a glance
The numbers that shape the ship
- Hit points
- 15,400
- Maximum speed
- 31.0 knots
- Surface detection
- 5.7 km
- Torpedo range
- 10.0 km
- Torpedo reload
- 30 s
Damage comparison
Published maximum per hit
Bars are normalized only against this ship's highest listed hit. They are not salvo damage, expected damage or DPM.
Handling, concealment and protectionOverview
Handling
- Maximum speed
- 31.0 knots
- Turning circle radius
- 460 m
- Rudder shift time
- 6.1 s
Concealment
- Surface detection
- 5.7 km
- Air detection
- 2.2 km
- Submarine detection
- 2.2 km
Survivability
- Hit points
- 15,400
- Torpedo damage reduction
- 0 %
Published armour thickness
Only positive values supplied by the API are shown.
- Overall published range
- 16–25 mm
Weapons and payloadsArmament
Underwater armament
Torpedoes
533 mm Mk VIII
- Maximum range
- 10.0 km
- Maximum damage per hit
- 5,700
- Reload time
- 30 s
- Speed
- 42 knots
- Detectability
- 1.1 km
Torpedo-tube layout
- Mount
- Torpedo Tubes: Bow Group
- Mounts
- 4
- Tubes each
- 1
- Mount
- Torpedo Tubes: Stern Group
- Mounts
- 2
- Tubes each
- 1
Submarine systemsClass system
Dive capacity
- Maximum capacity
- 310.0
- Consumption rate (API value)
- 1.0
- Regeneration rate (API value)
- 0.6
Underwater handling
- Maximum underwater speed
- 24 knots
- Maximum dive/ascent speed
- 3.1 knots
- Dive-plane shift time
- 15.8 s
Sonar ping
- Maximum range
- 10.0 km
- Ping width (API value)
- 15
- Ping velocity (API value)
- 500
- Reload time (API value)
- 6.5
- Single-sector duration (API value)
- 25
- Double-sector duration (API value)
- 55
Modules, hull and progressionTechnical data
Default hull
- Hull hit points
- 15,400
- Torpedo tubes
- 6
Engine
- Published maximum speed
- 31.0 knots
Module research tree
Names, research prices and defaults are reported directly by the API.
Propulsion: 4,300 hp
Default- Type
- Engine
Alliance
Default- Type
- Hull
533 mm Mk VIII
Default- Type
- Torpedoes
ASDIC 8 Mod. A
Default- Type
- Sonar
Compatible upgrades
Official modernization descriptions and listed purchase prices. Effects still depend on the slot and configuration used in game.
Propulsion Modification 1
ModernizationReduces time to full speed
- Credits
- 1,000,000
Torpedo Tubes Modification 1
Modernization- Credits
- 500,000
Damage Control System Modification 3
Modernization- Credits
- 250,000
Main Armaments Modification 1
Modernization- Credits
- 125,000
Damage Control System Modification 2
Modernization- Credits
- 1,000,000
Torpedo Tubes Modification 3
Modernization- Credits
- 2,000,000
- Available module groups
- 10
- Compatible upgrades
- 6
- Upgrade slots
- 5
- Published battle levels
- 8–10
Cross-nation comparison
Ships that fill a similar slot
Closest same-tier, same-class matches from other nations, ranked by published base statistics.
