Ship Database
Tier IX Battleship Premium

U.S.A.

Illinois

In the 1940s, several projects to modernize and reconstruct battleships were developed—from hybrid aircraft carriers to artillery training battleships. One of them was the conversion of the last two Iowa-class battleships into escort ships for aircraft carriers. According to the project, turrets with rapid-firing 203 mm guns were to be mounted on the main battery barbettes; however, this plan never materialized.

Doubloons
21,500
Official profile image of Illinois

At a glance

The numbers that shape the ship

Hit points
68,100
Maximum speed
32.5 knots
Surface detection
15.9 km
Main battery range
18.5 km
Main battery reload
9.0 s

Combat envelope

Range and detection

Scale: 20 km

Every bar uses the same 20 km scale. Surface detection is a visibility threshold, not a weapon range.

  • Surface detection15.9 km
  • Main battery18.5 km
  • Secondary battery7 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 · 203 mm HE/HC Mk25 2,800
  • AP · 203 mm AP Mk21 5,000
Handling, concealment and protectionOverview

Handling

Maximum speed
32.5 knots
Turning circle radius
930 m
Rudder shift time
17.2 s
Maneuverability API rating 45

Concealment

Surface detection
15.9 km
Air detection
10.0 km
Submarine detection
10.0 km
Concealment API rating 34

Survivability

Hit points
68,100
Torpedo damage reduction
25 %
Survivability API rating 86

Published armour thickness

Only positive values supplied by the API are shown.

Overall published range
16–439 mm
Weapons and payloadsArmament

Surface armament

Main battery

Artillery API rating 82
Maximum range
18.5 km
Reload time
9.0 s
Rate of fire
6.7 rounds/min
180° turn time
30.0 s
Maximum dispersion
203 m

Shells

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

203 mm HE/HC Mk25
HE
Maximum damage per hit
2,800
Fire chance
14.0 %
Muzzle velocity
823 m/s
Shell mass
118 kg
203 mm AP Mk21
AP
Maximum damage per hit
5,000
Muzzle velocity
762 m/s
Shell mass
152 kg
Gun layout
Mount
203 mm/55 RF Mk.16 in a turret
Mounts
3
Barrels each
4

Automatic armament

Secondary battery

Maximum range
7.0 km
Mount
127 mm HE Mk32
Maximum damage per hit
1,800
Fire chance
5.0 %
Rate of fire
10.0 rounds/min
Muzzle velocity
792 m/s

Anti-aircraft defence

AA defence API rating 90
Aura
20 mm Oerlikon on a Mk.24 mount
Calibre
20 mm
Mounts
24
Aura
76.2 mm/50 Mk.22 on a Mk.33 mount
Calibre
76 mm
Mounts
16
Aura
127 mm/38 Mk.12 on a Mk.32 mount
Calibre
127 mm
Mounts
10
Modules, hull and progressionTechnical data

Default hull

Hull hit points
68,100
Main-battery barrels
3
Secondary barrels
10
AA mounts
50

Engine

Published maximum speed
32.5 knots

Fire control

Module research tree

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

Propulsion: 212,000 hp

Default
Type
Engine

Illinois

Default
Type
Hull

203 mm/55 RF Mk.16 in a turret

Default
Type
Artillery

Mk9 mod. 1

Default
Type
Suo

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

Concealment System Modification 1

Modernization

Credits
2,000,000

Main Armaments Modification 1

Modernization

Credits
125,000

Damage Control System Modification 2

Modernization

Credits
1,000,000

Torpedo Lookout System

Modernization

Credits
2,000,000

Artillery Plotting Room Modification 2

Modernization

Credits
3,000,000

Main Battery Modification 3

Modernization

Credits
3,000,000

Main Battery Modification 2

Modernization

Credits
500,000

Damage Control System Modification 1

Modernization

Credits
250,000

Steering Gears Modification 1

Modernization

Credits
1,000,000

Artillery Plotting Room Modification 1

Modernization

Extends the firing range of the main battery and secondary battery

Credits
500,000

Secondary Battery Modification 1

Modernization

Credits
500,000

Auxiliary Armaments Modification 1

Modernization

Credits
125,000

AA Guns Modification 1

Modernization

Credits
500,000
Available module groups
10
Compatible upgrades
14
Upgrade slots
6
Published battle levels
9–11

Cross-nation comparison

Ships that fill a similar slot

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

Italy

AL Marco Polo

HP
69,100
Speed
32 kn
Guns
19 km
Open comparison

Pan-America

Valparaíso

HP
71,600
Speed
30 kn
Guns
18.7 km
Open comparison

France

Alsace

HP
69,000
Speed
30.4 kn
Guns
18.4 km
Open comparison