Ship Database
Tier VI Submarine

United Kingdom

Undine

U-class submarines were conceived as unarmed targets for anti-submarine training, but after the project had been approved, a decision was made to arm them with torpedoes. The fore-end was redesigned to accommodate six torpedo tubes. The submarines relied on electric motors to move, and they used diesel engines as generators. When World War II broke out,...

Read full ship history

U-class submarines were conceived as unarmed targets for anti-submarine training, but after the project had been approved, a decision was made to arm them with torpedoes. The fore-end was redesigned to accommodate six torpedo tubes. The submarines relied on electric motors to move, and they used diesel engines as generators. When World War II broke out, Undine participated in missions as part of the 6th Submarine Flotilla. On January 7, 1940, she was sunk by German auxiliary minesweepers.

Credits
4,500,000
Official profile image of Undine

At a glance

The numbers that shape the ship

Hit points
9,200
Maximum speed
20.0 knots
Surface detection
5.5 km
Torpedo range
9.0 km
Torpedo reload
45 s

Combat envelope

Range and detection

Scale: 10 km

Every bar uses the same 10 km scale. Surface detection is a visibility threshold, not a weapon range.

  • Surface detection5.5 km
  • Secondary battery4 km
  • Torpedoes9 km
  • Sonar ping9 km

Damage comparison

Published maximum per hit

Ship-relative

Bars are normalized only against this ship's highest listed hit. They are not salvo damage, expected damage or DPM.

  • Torpedo · 533 mm Mk VIII Mod 0 6,533
Handling, concealment and protectionOverview

Handling

Maximum speed
20.0 knots
Turning circle radius
320 m
Rudder shift time
5.9 s
Maneuverability API rating 33

Concealment

Surface detection
5.5 km
Air detection
2.0 km
Submarine detection
2.0 km
Concealment API rating 98

Survivability

Hit points
9,200
Torpedo damage reduction
0 %
Survivability API rating 17

Published armour thickness

Only positive values supplied by the API are shown.

Overall published range
16–25 mm
Weapons and payloadsArmament

Automatic armament

Secondary battery

Maximum range
4.0 km

Underwater armament

Torpedoes

Torpedoes API rating 8

533 mm Mk VIII Mod 0

Maximum range
9.0 km
Maximum damage per hit
6,533
Reload time
45 s
Speed
75 knots
Detectability
1.7 km
Torpedo-tube layout
Mount
Torpedo Tubes: Bow Group
Mounts
6
Tubes each
1
Submarine systemsClass system

Dive capacity

Maximum capacity
255.0
Consumption rate (API value)
1.0
Regeneration rate (API value)
0.6
Dive capacity API rating 33

Underwater handling

Maximum underwater speed
16 knots
Maximum dive/ascent speed
2.6 knots
Dive-plane shift time
9.1 s
Underwater maneuverability API rating 51

Sonar ping

Maximum range
9.0 km
Ping width (API value)
15
Ping velocity (API value)
500
Reload time (API value)
8.0
Single-sector duration (API value)
25
Double-sector duration (API value)
50
Sonar API rating 46
Modules, hull and progressionTechnical data

Default hull

Hull hit points
9,200
Secondary barrels
1
Torpedo tubes
6

Engine

Published maximum speed
20.0 knots

Module research tree

Names, research prices and defaults are reported directly by the API.

533 mm Mk VIII

Default
Type
Torpedoes
Purchase
350,000 credits
Next modules
1

533 mm Mk VIII

Type
Torpedoes
Research
8,000 XP
Purchase
700,000 credits

Undine (A)

Default
Type
Hull
Purchase
400,000 credits
Next modules
1

Undine (B)

Type
Hull
Research
12,000 XP
Purchase
1,050,000 credits
Next ships
1

ASDIC 6 Mod. A

Default
Type
Sonar
Purchase
350,000 credits
Next modules
1

ASDIC 6 Mod. B

Type
Sonar
Research
8,000 XP
Purchase
700,000 credits

Propulsion: 825 hp

Default
Type
Engine
Purchase
350,000 credits

Compatible upgrades

Official modernization descriptions and listed purchase prices. Effects still depend on the slot and configuration used in game.

Propulsion Modification 1

Modernization

Reduces 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

Next ships

Research costs published in this ship's official progression data.

Ship
Sturdy
Research cost
161,000 XP
Available module groups
10
Compatible upgrades
5
Researchable next ships
1
Upgrade slots
4
Published battle levels
6–8

Cross-nation comparison

Ships that fill a similar slot

Closest same-tier, same-class matches from other nations, ranked by published base statistics.

Italy

Foca

HP
12,600
Speed
25 kn
Guns
8.5 km
Torps
8 km
Open comparison

U.S.A.

Cachalot

HP
11,700
Speed
27 kn
Torps
10 km
Open comparison

Germany

U-69

HP
10,200
Speed
27 kn
Torps
11.5 km
Open comparison