Ship Database

Tier X Submarine Special

Japan

I-56 '44

One of three B3-class cruiser submarines built under a naval shipbuilding program adopted just before the outbreak of World War II. I-56 entered service in June 1944. Initially armed with a 140 mm gun, the submarine retained this configuration only briefly. By October 1944, she had already begun conversion into a carrier for manned torpedoes.

Doubloons: 26,000

At a glance

The numbers that shape the ship

Hit points: 25,600
Maximum speed: 30.0 knots
Surface detection: 7.1 km
Main battery range: 10.0 km
Main battery reload: 2.0 s

Combat envelope

Range and detection

Scale: 15 km

Every bar uses the same 15 km scale. Surface detection is a visibility threshold, not a weapon range.

Surface detection7.1 km
Main battery10 km
Torpedoes15 km
Sonar ping8.5 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.

HE · 140 mm HE Type1 2,500
Torpedo · Type95 mod. 3 25,833

Handling, concealment and protectionOverview

Handling

Maximum speed: 30.0 knots
Turning circle radius: 590 m
Rudder shift time: 9.0 s

Maneuverability API rating 50

Concealment

Surface detection: 7.1 km
Air detection: 2.6 km
Submarine detection: 2.6 km

Concealment API rating 90

Survivability

Hit points: 25,600
Torpedo damage reduction: 0 %

Survivability API rating 41

Published armour thickness

Only positive values supplied by the API are shown.

Overall published range: 6–19 mm

Weapons and payloadsArmament

Surface armament

Main battery

Artillery API rating 25

Maximum range: 10.0 km
Reload time: 2.0 s
Rate of fire: 30.0 rounds/min
180° turn time: 7.2 s
Maximum dispersion: 49 m

Shells

Damage is the API's published maximum for one shell hit.

140 mm HE Type1

Maximum damage per hit: 2,500
Fire chance: 16.0 %
Muzzle velocity: 850 m/s
Shell mass: 38 kg

Gun layout

Mount: 140 mm/40 11th Year Type
Mounts: 1
Barrels each: 1

Automatic armament

Secondary battery

Underwater armament

Torpedoes

Torpedoes API rating 36

Type95 mod. 3

Maximum range: 15.0 km
Maximum damage per hit: 25,833
Reload time: 45 s
Speed: 78 knots
Detectability: 2.1 km

Torpedo-tube layout

Mount: Torpedo Tubes: Bow Group
Mounts: 6
Tubes each: 1

Submarine systemsClass system

Dive capacity

Maximum capacity: 90.0
Consumption rate (API value): 1.0
Regeneration rate (API value): 2.0

Dive capacity API rating 5

Underwater handling

Maximum underwater speed: 13 knots
Maximum dive/ascent speed: 2.9 knots
Dive-plane shift time: 25.9 s

Underwater maneuverability API rating 5

Sonar ping

Maximum range: 8.5 km
Ping width (API value): 18
Ping velocity (API value): 600
Reload time (API value): 6.5
Single-sector duration (API value): 25
Double-sector duration (API value): 55

Sonar API rating 50

Modules, hull and progressionTechnical data

Default hull

Hull hit points: 25,600
Main-battery barrels: 1
Torpedo tubes: 6

Engine

Published maximum speed: 30.0 knots

Module research tree

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

Type10 mod. 1

Default

Type: Sonar

I-56 '44

Default

Type: Hull

Propulsion: 9,400 hp

Default

Type: Engine

Type95 mod. 3

Default

Type: Torpedoes

140 mm/40 11th Year Type

Default

Type: Artillery

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

Torpedo Tubes Modification 2

Modernization

Credits: 3,000,000

Aiming Systems Modification 1

Modernization

Credits: 500,000

Damage Control System Modification 2

Modernization

Credits: 1,000,000

Main Battery Modification 3

Modernization

Credits: 3,000,000

Main Battery Modification 2

Modernization

Credits: 500,000

Torpedo Tubes Modification 3

Modernization

Credits: 2,000,000

Gun Fire Control System Modification 2

Modernization

Credits: 3,000,000

Available module groups: 10
Compatible upgrades: 11
Upgrade slots: 6
Published battle levels: 10–11

Cross-nation comparison

Ships that fill a similar slot

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

Germany

U-2501

HP: 18,900
Speed: 27 kn
Torps: 14 km

Open comparison

U.S.A.

Balao

HP: 20,200
Speed: 30 kn
Torps: 12 km

Open comparison

The Netherlands

Tonijn

HP: 17,800
Speed: 25 kn
Torps: 12 km

Open comparison