Naval technology

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Naval research tree
Naval research tree.png

With Man the Guns[edit]

Destroyers[edit]

Destroyer hulls[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Early Destroyer Hull Early Destroyer Hull 1922 127 days
2 Steel.png
Early Destroyer Hull
Service Manpower: 250 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 10.0
Depth Charges: 1.0 Max Speed: 36.3 kn
Max Range: 1500 km HP: 25.0
Reliability: 64.0% Fuel Usage: 7.0
Production Cost.png Production Cost: 490

Unlocks
35,000 Shp Engine 35,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +21%
Reliability: −20% Fuel Usage: 7.0
Production Cost.png Production Cost: 90
1936 Destroyer Hull 1936 Destroyer Hull 1936 127 days 1936 Destroyer Hull
2 Steel.png
1936 Destroyer Hull
Service Manpower: 325 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 10.0
Depth Charges: 1.0 Max Speed: 39.6 kn
Max Range: 1800 km HP: 40.0
Reliability: 68.0% Fuel Usage: 8.0
Production Cost.png Production Cost: 620.00

Unlocks
40,000 Shp Engine 40,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +32%
Reliability: −20% Fuel Usage: 8.0
Production Cost.png Production Cost: 120.00
1940 Destroyer Hull 1940 Destroyer Hull 1940 127 days 1936 Destroyer Hull
3 Steel.png
1940 Destroyer Hull
Service Manpower: 400 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 10.0
Depth Charges: 1.0 Max Speed: 42.6 kn
Max Range: 2000 km HP: 50.0
Reliability: 72.0% Fuel Usage: 10.0
Production Cost.png Production Cost: 700.00

Unlocks
45,000 Shp Engine 45,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +42%
Reliability: −20% Fuel Usage: 10.0
Production Cost.png Production Cost: 150.00
1944 Destroyer Hull 1944 Destroyer Hull 1944 170 days 1940 Destroyer Hull
4 Steel.png 1 Chromium.png
1944 Destroyer Hull
Service Manpower: 500 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 10.0
Depth Charges: 1.0 Max Speed: 42.6 kn
Max Range: 2500 km HP: 60.0
Reliability: 73.6% Fuel Usage: 10.0
Production Cost.png Production Cost: 750.00

Unlocks
50,000 Shp Engine 50,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +47%
Reliability: −20% Fuel Usage: 10.0
Production Cost.png Production Cost: 170.00

Anti-submarine warfare[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Basic Depth Charges Basic Depth Charges 1922 127 days Early Destroyer Hull
Unlocks
Depth Charge Rails Depth Charge Rails
Depth charges: 8.0 Max Speed: -2%
Production Cost.png Production Cost: 90.00
Depth Charge Thrower Depth Charge Thrower 1936 127 days Basic Depth Charges
Unlocks
Depth Charge Thrower Depth Charge Thrower
Depth charges: 12.0 Max Speed: -2%
Production Cost.png Production Cost: 120.00
Depth Charge Mortar Depth Charge Mortar 1940 127 days Depth Charge Thrower
Unlocks
Anti-submarine Mortar Anti-submarine Mortar
Depth charges: 16.0 Max Speed: -2%
Production Cost.png Production Cost: 150.00
Improved Depth Charge Mortar Improved Depth Charge Mortar 1944 127 days Depth Charge Mortar
Unlocks
Advanced Anti-submarine Mortar Advanced Anti-submarine Mortar
Depth charges: 20.0 Max Speed: -2%
Production Cost.png Production Cost: 180.00

Detection[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Smoke Generators Smoke Generators 1922 63 days Early Destroyer Hull
Global stats
Fleet speed while retreating: +20%
Passive Sonar Passive Sonar 1922 127 days Early Destroyer Hull
Unlocks
Sonar 1.png Hydrophones
Sub detection: 4.0 Production Cost.png Production Cost: 40.00
Active Sonar Active Sonar 1936 127 days Passive Sonar
Unlocks
Sonar 2.png Active Sonar
Sub detection: 7.0 Production Cost.png Production Cost: 60.00
Improved Airplane Catapult Improved Airplane Catapult 1936 63 days Early Cruiser Hull
Unlocks
Improved Floatplane Catapult Improved Floatplane Catapult
Surface Detection: 10.0 Sub Detection: 3.5
-Max Speed: -1% Production Cost.png Production Cost: 170

Cruisers[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Early Cruiser Hull Early Cruiser Hull 1922 127 days
1 Steel.png
Early Cruiser Hull
Service Manpower: 600 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 15
Max Speed: 30.0 kn Max Range: 2500 km
HP: 100 Reliability: 64.0%
Fuel Usage: 32.0 Production Cost.png Production Cost: 2200

Unlocks
Floatplane Catapult Floatplane Catapult
Surface Detection: 7.0 Sub Detection: 2.5
Max Speed: −1% Production Cost.png Production Cost: 150
Cruiser Armor I Cruiser Armor I
Max Speed: -5% Armor: 6.0
Production Cost.png Production Cost: +10%
60,000 Shp Engine 60,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +20%
Reliability: −20% Fuel Usage: 12.0
Production Cost.png Production Cost: 400
1936 Cruiser Hull 1936 Cruiser Hull 1936 127 days Early Cruiser Hull
2 Steel.png
1936 Cruiser Hull
Service Manpower: 800 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 15
Max Speed: 40.3 kn Max Range: 3000 km
HP: 110 Reliability: 68.0%
Fuel Usage: 36.0 Production Cost.png Production Cost: 2380

Unlocks
70,000 Shp Engine 70,000 Shp Engine
Max Speed: 6.0 kn Max Speed: +30%
Reliability: −20% Fuel Usage: 16.0
Production Cost.png Production Cost: 480
1940 Cruiser Hull 1940 Cruiser Hull 1940 127 days 1936 Cruiser Hull
2 Steel.png
1940 Cruiser Hull
Service Manpower: 1200 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 15
Max Speed: 42.9 kn Max Range: 4000 km
HP: 120 Reliability: 72.0%
Fuel Usage: 36.0 Production Cost.png Production Cost: 2480

Unlocks
80,000 Shp Engine 80,000 Shp Engine
Max Speed: 7.0 kn Max Speed: +35%
Reliability: −20% Fuel Usage: 20.0
Production Cost.png Production Cost: 550
1944 Cruiser Hull 1944 Cruiser Hull 1944 127 days 1940 Cruiser Hull
3 Steel.png
1944 Cruiser Hull
Service Manpower: 1400 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 15
Max Speed: 44.2 kn Max Range: 4500 km
HP: 130 Reliability: 76.0%
Fuel Usage: 36.0 Production Cost.png Production Cost: 2580

Unlocks
90,000 Shp Engine 90,000 Shp Engine
Max Speed: 7.0 kn Max Speed: +40%
Reliability: −20% Fuel Usage: 24.0
Production Cost.png Production Cost: 670
Basic Cruiser Armor Scheme Basic Cruiser Armor Scheme 1936 106 days 1936 Cruiser Hull
Unlocks
1 Steel.png
Cruiser Armor II Cruiser Armor II
Max Speed: -7% HP: +5%
Armor: 8.0 Production Cost.png Production Cost: +15%
Inclined Belt Cruiser Armor Scheme Inclined Belt Cruiser Armor Scheme 1940 106 days Basic Cruiser Armor Scheme
Unlocks
1 Steel.png 1 Chromium.png
Cruiser Armor III Cruiser Armor III
Max Speed: -10% HP: +10%
Armor: 10.0 Production Cost.png Production Cost: +20%
All-or-Nothing Cruiser Armor Scheme All-or-Nothing Cruiser Armor Scheme 1944 106 days Inclined Belt Cruiser Armor Scheme
Unlocks
2 Steel.png 1 Chromium.png
Cruiser Armor IV Cruiser Armor IV
Max Speed: -12% HP: +15%
Armor: 12.0 Production Cost.png Production Cost: +25%

Battleships[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Early Heavy Ship Hull Early Heavy Ship Hull 1922 148 days
1 Steel.png 1 Chromium.png
Early Heavy Ship Hull
Service Manpower: 4000 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 30.0
Max Speed: 27.0 kn Max Range: 3000 km
HP: 367.5 Armor: 26.0
Reliability: 64.0% Fuel Usage: 87.0
Production Cost.png Production Cost: 6120

Unlocks
1 Steel.png
Battleship Armor I Battleship Armor I
Surface Visibility: 10.0 Max Speed: -20%
HP: +5% Armor: 26.0
Production Cost.png Production Cost: +20%
Battlecruiser Armor I Battlecruiser Armor I
Surface Visibility: 8.0 Max Speed: -10%
HP: +5% Armor: 20.0
Production Cost.png Production Cost: +7%
30,000 Shp Engine 30,000 Shp Engine
Max Speed: 7.0 kn Max Speed: +20%
Reliability: −20% Fuel Usage: 20.0
Production Cost.png Production Cost: 1800
1936 Heavy Ship Hull 1936 Heavy Ship Hull 1936 127 days Early Ship Hull Heavy
1 Steel.png 1 Chromium.png
1936 Heavy Ship Hull
Service Manpower: 5200 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 30.0
Max Speed: 35.2 kn Max Range: 3500 km
HP: 388.5 Armor: 26.0
Reliability: 68.0% Fuel Usage: 92.0
Production Cost.png Production Cost: 6720

Unlocks
90,000 Shp Engine 90,000 Shp Engine
Max Speed: 10.0 kn Max Speed: +30%
Reliability: −20% Fuel Usage: 25.0
Production Cost.png Production Cost: 2200
Super Heavy Battleship Hull Super Heavy Battleship Hull 1936 127 days 1936 Heavy Ship Hull
1 Steel.png 1 Chromium.png
Super Heavy Battleship Hull
Service Manpower: 9000 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 30.0
Max Speed: 33.6 kn Max Range: 4500 km
HP: 770 Armor: 55
Reliability: 64.0% Fuel Usage: 100.0
Production Cost.png Production Cost: 9625

Unlocks
2 Steel.png 1 Chromium.png
Super-Heavy Battleship Armor III Super-Heavy Battleship Armor III
Surface Visibility: 10.0 Max Speed: -25%
HP: +10% Armor: 55.0
Production Cost.png Production Cost: +25%
1940 Heavy Ship Hull 1940 Heavy Ship Hull 1940 127 days 1936 Heavy Ship Hull
1 Steel.png 1 Chromium.png
1940 Heavy Ship Hull
Service Manpower: 6000 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 30.0
Max Speed: 37.4 kn Max Range: 4000 km
HP: 420 Armor: 26
Reliability: 72.0% Fuel Usage: 92.0
Production Cost.png Production Cost: 6840

Unlocks
150,000 Shp Engine 150,000 Shp Engine
Max Speed: 11.0 kn Max Speed: +40%
Reliability: −20% Fuel Usage: 30.0
Production Cost.png Production Cost: 2600
1944 Heavy Ship Hull 1944 Heavy Ship Hull 1944 127 days 1940 Heavy Ship Hull
1 Steel.png 1 Chromium.png
1944 Heavy Ship Hull
Service Manpower: 6000 Surface Detection: 20.0
Sub Detection: 1.0 Surface Visibility: 30.0
Max Speed: 39.6 kn Max Range: 4500 km
HP: 472.5 Armor: 26.0
Reliability: 76.0% Fuel Usage: 92.0
Production Cost.png Production Cost: 6960

Unlocks
210,000 Shp Engine 210,000 Shp Engine
Max Speed: 12.0 kn Max Speed: +45%
Reliability: −20% Fuel Usage: 35.0
Production Cost.png Production Cost: 3000
Inclined Belt Armor Scheme Inclined Belt Armor Scheme 1936 106 days Early Heavy Ship Hull
Unlocks
1 Steel.png
Battleship Armor II Battleship Armor II
Surface Visibility: 10.0 Max Speed: -20%
HP: +10% Armor: 31.0
Production Cost.png Production Cost: +20%
1 Steel.png
Battlecruiser Armor II Battlecruiser Armor II
Surface Visibility: 8.0 Max Speed: -10%
HP: +10% Armor: 25.0
Production Cost.png Production Cost: +7%
All-or-Nothing Armor Scheme All-or-Nothing Armor Scheme 1940 106 days Inclined Belt Armor Scheme
Unlocks
2 Steel.png 1 Chromium.png
Battleship Armor III Battleship Armor III
Surface Visibility: 10.0 Max Speed: -20%
HP: +15% Armor: 40.0
Production Cost.png Production Cost: +20%
1 Steel.png 1 Chromium.png
Battlecruiser Armor III Battlecruiser Armor III
Surface Visibility: 8.0 Max Speed: -10%
HP: +15% Armor: 30.0
Production Cost.png Production Cost: +7%

Carriers[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Deck Conversions Deck Conversions 1922 148 days
4 Steel.png 1 Chromium.png
Converted Battleship Hull
Service Manpower: 5000 Surface Detection: 26.0
Sub Detection: 5.0 Surface Visibility: 30.0
Max Speed: 36.0 kn Max Range: 4000 km
HP: 325.0 Reliability: 52.0%
Fuel Usage: 107.0 Production Cost.png Production Cost: 4500
3 Steel.png 1 Chromium.png
Converted Cruiser Hull
Service Manpower: 1000 Surface Detection: 26.0
Sub Detection: 5.0 Surface Visibility: 30.0
Max Speed: 30.0 kn Max Range: 4000 km
HP: 125.0 Reliability: 52.0%
Fuel Usage: 99.0 Production Cost.png Production Cost: 3100

Unlocks
1 Steel.png
Deck Armor Deck Armor
Max Speed: -5% HP: 25
Armor: 5.0 Production Cost.png Production Cost: +10%
50,000 Shp Engine 50,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +20%
Reliability: −20% Fuel Usage: 12.0
Production Cost.png Production Cost: 400
1 Steel.png
Hangar Space Hangar Space
Max Speed: -5% Desk Size: 20
Production Cost.png Production Cost: 2000
1936 Carrier Hull 1936 Carrier Hull 1936 127 days Deck Conversions
3 Steel.png 1 Chromium.png
1936 Carrier Hull
Service Manpower: 4500 Surface Detection: 26.0
Sub Detection: 5.0 Surface Visibility: 30.0
Max Speed: 40.3 kn Max Range: 3000 km
HP: 250.0 Reliability: 56.0%
Fuel Usage: 103.0 Production Cost.png Production Cost: 2930

Unlocks
120,000 Shp Engine 120,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +30%
Reliability: −20% Fuel Usage: 16.0
Production Cost.png Production Cost: 480
1940 Carrier Hull 1940 Carrier Hull 1940 127 days 1936 Carrier Hull
4 Steel.png 1 Chromium.png
1940 Carrier Hull
Service Manpower: 5000 Surface Detection: 26.0
Sub Detection: 5.0 Surface Visibility: 30.0
Max Speed: 43.4 kn Max Range: 4000 km
HP: 325.0 Reliability: 60.0%
Fuel Usage: 107.0 Production Cost.png Production Cost: 3150

Unlocks
150,000 Shp Engine 150,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +40%
Reliability: −20% Fuel Usage: 20.0
Production Cost.png Production Cost: 550
1944 Carrier Hull 1944 Carrier Hull 1944 127 days 1940 Carrier Hull
4 Steel.png 2 Chromium.png
1944 Carrier Hull
Service Manpower: 5500 Surface Detection: 26.0
Sub Detection: 5.0 Surface Visibility: 30.0
Max Speed: 43.4 kn Max Range: 5000 km
HP: 350.0 Reliability: 64.0%
Fuel Usage: 107.0 Production Cost.png Production Cost: 3800

Unlocks
210,000 Shp Engine 210,000 Shp Engine
Max Speed: 5 kn Max Speed: +45%
Reliability: −20% Fuel Usage: 24.0
Production Cost.png Production Cost: 670

Submarines[edit]

Submarine hulls[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Early Submarine Hull Early Submarine Hull 1922 127 days Basic Torpedo
1 Steel.png
Early Submarine Hull
Service Manpower: 200 Surface Detection: 20.0
Surface Visibility: 1.0 Sub Visibility: 25.0
Max Speed: 19.9 kn Max Range: 2500 km
HP: 10.0 Reliability: 48.0%
Fuel Usage: 8.0 Production Cost.png Production Cost: 310

Unlocks
Torpedo Tubes I Torpedo Tubes I
Torpedo Attack: 14.0 Production Cost.png Production Cost: 80
1,000 Shp Engine 1,000 Shp Engine
Max Speed: 5.0 kn Max Speed: +5%
Reliability: −20% Fuel Usage: 7.0
Production Cost.png Production Cost: 90
1936 Submarine Hull 1936 Submarine Hull 1936 127 days Early Submarine Hull
2 Steel.png
1936 Submarine Hull
Service Manpower: 200 Surface Detection: 20.0
Surface Visibility: 1.0 Sub Visibility: 19.0
Max Speed: 20.9 kn Max Range: 4000 km
HP: 20.0 Reliability: 56.0%
Fuel Usage: 9.0 Production Cost.png Production Cost: 370

Unlocks
Torpedo Tubes II Torpedo Tubes II
Torpedo Attack: 18.0 Production Cost.png Production Cost: 100
2000 Shp Engine 2,000 Shp Engine
Sub Visibility: −5% Max Speed: 5.0 kn
Max Speed: +10% Reliability: −20%
Fuel Usage: 8.0 Production Cost.png Production Cost: 120
1940 Submarine Hull 1940 Submarine Hull 1940 170 days 1936 Submarine Hull
2 Steel.png
1940 Submarine Hull
Service Manpower: 200 Surface Detection: 20.0
Surface Visibility: 1.0 Sub Visibility: 14.2
Max Speed: 22.0 kn Max Range: 5000 km
HP: 30.0 Reliability: 60.0%
Fuel Usage: 9.0 Production Cost.png Production Cost: 440

Unlocks
Torpedo Tubes III Torpedo Tubes III
Torpedo Attack: 22.0 Production Cost.png Production Cost: 1200
3000 Shp Engine 3,000 Shp Engine
Sub Visibility: −10% Max Speed: 5.0 kn
Max Speed: +15% Reliability: −20%
Fuel Usage: 10.0 Production Cost.png Production Cost: 150
1944 Submarine Hull 1944 Submarine Hull 1944 170 days 1940 Submarine Hull
3 Steel.png 1 Chromium.png
1944 Submarine Hull
Service Manpower: 200 Surface Detection: 20.0
Surface Visibility: 1.0 Sub Visibility: 11.4
Max Speed: 23.1 kn Max Range: 6000 km
HP: 35.0 Reliability: 64.0%
Fuel Usage: 9.0 Production Cost.png Production Cost: 570

Unlocks
Torpedo Tubes IV Torpedo Tubes IV
Torpedo Attack: 28.0 Production Cost.png Production Cost: 140
4,000 Shp Engine 4,000 Shp Engine
Sub Visibility: −15% Max Speed: 5.0 kn
Max Speed: 200% Reliability: −20%
Fuel Usage: 10.0 Production Cost.png Production Cost: 170
Basic Submarine Snorkel Basic Submarine Snorkel 1940 85 days Either:
  • 1936 Submarine Hull
  • 1940 Submarine Hull
Unlocks
Basic Schnorkel Basic Schnorkel
Sub Visibility: -10% Production Cost.png Production Cost: 50
Improved Submarine Snorkel Improved Submarine Snorkel 1944 170 days Basic Submarine Snorkel
Unlocks
Improved Schnorkel Improved Schnorkel
Sub Visibility: -20% Production Cost.png Production Cost: 70

Ship-based torpedo tubes[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
4x 450mm Torpedo Launcher Improved Ship Torpedo Launcher 1936 127 days Basic Torpedo
Unlocks
Torpedo Launcher II Torpedo Launcher II
Torpedo Attack: 27.0 Max Speed: -1%
Production Cost.png Production Cost: 120
Advanced Ship Torpedo Launcher Advanced Ship Torpedo Launcher 1940 127 days Improved Ship Torpedo Launcher
Unlocks
Torpedo Launcher III Torpedo Launcher III
Torpedo Attack: 36.0 Max Speed: -1%
Production Cost.png Production Cost: 150
Modern Ship Torpedo Launcher Modern Ship Torpedo Launcher 1944 127 days Advanced Ship Torpedo Launcher
Unlocks
Torpedo Launcher IV Torpedo Launcher IV
Torpedo Attack: 45.0 Max Speed: -1%
Production Cost.png Production Cost: 180

Torpedo warfare[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Basic Torpedo Basic Torpedo 1922 170 days
Unlocks
Torpedo Launcher I Torpedo Launcher I
Torpedo Attack: 18.0 Max Speed: -1%
Production Cost.png Production Cost: 90
Magnetic Detonator Magnetic Detonator 1936 212 days Basic Torpedo
Upgrades
Destroyers, Submarines, Light Cruisers, Heavy Cruisers
Torpedo Attack: +20%
Homing Torpedo Homing Torpedo 1942 212 days Magnetic Detonator
Upgrades
Destroyers, Submarines, Light Cruisers, Heavy Cruisers
Torpedo Attack: +20%
Electric Torpedo Electric Torpedo 1940 212 days Magnetic Detonator
Global stats
Torpedo Reveal Chance: -25%

Armaments[edit]

Batteries[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Naval Gunnery Naval Gunnery 1922 85 days
Unlocks
Light Battery I Light Battery I
Light Attack: 1.0 Light Piercing: 1.9
Max Speed: -1% Production Cost.png Production Cost: 90
1 Steel.png
Heavy Cruiser Battery I Heavy Cruiser Battery I
Surface Visibility: 3.5 Heavy Attack: 8.0
Heavy Piercing: 22.0 Max Speed: -4%
HP: +40% Production Cost.png Production Cost: 750
Light Cruiser Battery I Light Cruiser Battery I
Light Attack: 4.0 Light Piercing: 5.5
Max Speed: -3% HP: 20.0
Production Cost.png Production Cost: 225
1 Steel.png
Heavy Battery I Heavy Battery I
Heavy Attack: 12.0 Heavy Piercing: 31.0
Max Speed: -5% Production Cost.png Production Cost: 1250
Basic Light Battery Basic Light Battery 1936 85 days Naval Gunnery
Unlocks
Light Battery II Light Battery II
Light Attack: 1.5 Light Piercing: 2.0
Max Speed: -1% Production Cost.png Production Cost: 120
Basic Medium Battery Basic Medium Battery 1936 85 days Naval Gunnery
Unlocks
1 Steel.png
Heavy Cruiser Battery II Heavy Cruiser Battery II
Surface Visibility: 3.5 Heavy Attack: 9.0
Heavy Piercing: 25.0 Max Speed: -6%
HP: +40% Production Cost.png Production Cost: 800
Light Cruiser Battery II Light Cruiser Battery II
Light Attack: 5.0 Light Piercing: 7.0
Max Speed: -4% HP: 20.0
Production Cost.png Production Cost: 275
Basic Heavy Battery Basic Heavy Battery 1936 85 days Naval Gunnery
Unlocks
1 Steel.png
Heavy Battery II Heavy Battery II
Heavy Attack: 14.0 Heavy Piercing: 36.0
Max Speed: -8% Production Cost.png Production Cost: 1350
1 Steel.png 1 Chromium.png
Super-Heavy Battery V Super-Heavy Battery V
Heavy Attack: 18.0 Heavy Piercing: 50.0
Max Speed: -10% Production Cost.png Production Cost: 1700
Improved Light Battery Improved Light Battery 1940 85 days Basic Light Battery
Unlocks
Light Battery III Light Battery III
Light Attack: 2.0 Light Piercing: 2.5
Max Speed: -1% Production Cost.png Production Cost: 150
Improved Medium Battery Improved Medium Battery 1940 85 days Basic Medium Battery
Unlocks
2 Steel.png
Heavy Cruiser Battery III Heavy Cruiser Battery III
Surface Visibility: 3.5 Heavy Attack: 10.0
Heavy Piercing: 29.0 Max Speed: -7%
HP: +40% Production Cost.png Production Cost: 825
1 Steel.png
Light Cruiser Battery III Light Cruiser Battery III
Light Attack: 6.0 Light Piercing: 8.0
Max Speed: -4% HP: 20.0
Production Cost.png Production Cost: 300
Improved Heavy Battery Improved Heavy Battery 1940 85 days Basic Heavy Battery
Unlocks
1 Steel.png
Heavy Battery III Heavy Battery III
Heavy Attack: 15.0 Heavy Piercing: 40.0
Max Speed: -9% Production Cost.png Production Cost: 1450
Advanced Light Battery Advanced Light Battery 1944 85 days Improved Light Battery
Unlocks
Light Battery IV Light Battery IV
Light Attack: 3.0 Light Piercing: 2.5
Max Speed: -2% Production Cost.png Production Cost: 175
Advanced Medium Battery Advanced Medium Battery 1944 85 days Improved Medium Battery
Unlocks
2 Steel.png
Heavy Cruiser Battery IV Heavy Cruiser Battery IV
Surface Visibility: 3.5 Heavy Attack: 11.0
Heavy Piercing: 34.0 Max Speed: -8%
HP: +40% Production Cost.png Production Cost: 900
1 Steel.png
Light Cruiser Battery IV Light Cruiser Battery IV
Light Attack: 7.5 Light Piercing: 9.0
Max Speed: -5% HP: 20.0
Production Cost.png Production Cost: 350
Advanced Heavy Battery Advanced Heavy Battery 1944 85 days Improved Heavy Battery
Unlocks
1 Steel.png 1 Steel.png
Heavy Battery IV Heavy Battery IV
Heavy Attack: 16.0 Heavy Piercing: 43.0
Max Speed: -10% Production Cost.png Production Cost: 1550

Shells[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Small-Caliber Semi-Armor Piercing Shell Small-Caliber Semi-Armor Piercing Shell 1936 127 days Basic Light Battery
Upgrades
Destroyers, Light Cruisers, Heavy Cruisers, Battleships, Battlecruisers, Carriers
Light Attack: +5%
Light Piercing: +5%
Small-Caliber Armor Piercing Shell Small-Caliber Armor Piercing Shell 1942 127 days Small-Caliber Semi-Armor Piercing Shell
Upgrades
Destroyers, Light Cruisers, Heavy Cruisers, Battleships, Battlecruisers, Carriers
Light Attack: +5%
Light Piercing: +5%
Armor-Piercing Capped Medium Shell Armor-Piercing Capped Medium Shell 1936 127 days Basic Medium Battery
Upgrades
Light Cruisers
Light Attack: +5%
Light Piercing: +5%
Heavy Cruisers
Heavy Attack: +5%
Heavy Piercing: +5%
Medium-Caliber Semi-Armor Piercing Shell Medium-Caliber Semi-Armor Piercing Shell 1942 127 days Armor-Piercing Capped Medium Shell
Upgrades
Light Cruisers
Light Attack: +5%
Light Piercing: +5%
Heavy Cruisers
Heavy Attack: +5%
Heavy Piercing: +5%
Armor-Piercing Capped Shell Armor-Piercing Capped Shell 1938 127 days Basic Heavy Battery
Upgrades
Battleships, Battlecruisers
Heavy Attack: +5%
Heavy Piercing: +5%
Super-Heavy Armor Piercing Shell Super-Heavy Armor Piercing Shell 1942 127 days Armor-Piercing Capped Shell
Upgrades
Battleships, Battlecruisers
Heavy Attack: +5%
Heavy Piercing: +5%

Secondary batteries[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Casemate Secondary Battery Casemate Secondary Battery 1922 68 days
Unlocks
Secondary Battery I Secondary Battery I
Light Attack: 3.0 Light Piercing: 5.5
Max Speed: -2% Production Cost.png Production Cost: 180
Turreted Secondary Battery Turreted Secondary Battery 1936 68 days Casemate Secondary Battery
Unlocks
Secondary Battery II Secondary Battery II
Light Attack: 4.0 Light Piercing: 7.0
Max Speed: -2% Production Cost.png Production Cost: 240
Dual-Purpose Secondary Battery Dual-Purpose Secondary Battery 1940 68 days Turreted Secondary Battery
Unlocks
Dual-Purpose Secondary Battery Dual-Purpose Secondary Battery
Light Attack: 4.5 Light Piercing: 8.0
Anti-Air: 2.5 Max Speed: -3%
Production Cost.png Production Cost: 290
1 Steel.png
Dual-Purpose Battery Dual-Purpose Battery
Light Attack: 3.0 Light Piercing: 2.0
Anti-Air: 3.0 Max Speed: -2%
Production Cost.png Production Cost: 300

Damage control[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Fire Fighting Drills Fire Fighting Drills 212 days
Global stats
Chance to Receive Critical Hit: -10%
Effects of sustained Critical Hits: -10%
Separate Fire Mains Separate Fire Mains 212 days Fire Fighting Drills
Global stats
Chance to Receive Critical Hit: -10%
Effects of sustained Critical Hits: -10%
Diesel-powered Emergency Pumps Diesel-powered Emergency Pumps 212 days Separate Fire Mains
Global stats
Chance to Receive Critical Hit: -10%
Effects of sustained Critical Hits: -10%

Fire control methods[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Fire Control Methods I Fire Control Methods I 212 days
Upgrades
Battleships, Battlecruisers
Light Attack: +5%
Heavy Attack: +5%
Fire Control Methods II Fire Control Methods II 212 days Fire Control Methods I
Upgrades
Battleships, Battlecruisers
Light Attack: +10%
Heavy Attack: +10%
Heavy Cruisers
Light Attack: +5%
Heavy Attack: +5%
Fire Control Methods III Fire Control Methods III 212 days Fire Control Methods II
Upgrades
Battleships, Battlecruisers
Light Attack: +15%
Heavy Attack: +15%
Heavy Cruisers, Light Cruisers
Light Attack: +10%
Heavy Attack: +10%
Destroyers
Light Attack: +5%
Heavy Attack: +5%

Transports[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Transport Ship Transport Ship 212 days
Global stats
Troop convoy requirements: -50%
Naval Invasion Capacity: +10
Landing Craft Landing Craft 212 days Transport Ship
Global stats
Invasion Preparation Time: -50%
Invasion Defense: +15%
Naval Invasion Capacity: +40
Advanced Landing Craft Advanced Landing Craft 212 days Landing Craft
Global stats
Invasion Defense: +50%
Naval Invasion Capacity: +100
Amphibious Invasion Preparation Speed: +25%

Mine warfare[edit]

Mines[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Contact Mine Contact Mine 1922 170 days
Unlocks
Minelaying rails.png Minelaying Rails
Max Speed: -2% Minelaying: 1.0
Production Cost.png Production Cost: 90
Minesweeping Gear Minesweeping Gear
Max Speed: -2% Minesweeping: 1.0
Production Cost.png Production Cost: 30
Magnetic Mine Magnetic Mine 1936 170 days Contact Mine
Global Stats
Naval mines damage: +20%
Degaussing Degaussing 1938 85 days Magnetic Mine
Global Stats
Naval mines avoidance: +50%
Acoustic Mine Acoustic Mine 1942 170 days Magnetic Mine
Global Stats
Naval mines damage: +20%
Pressure Mine Pressure Mine 1945 170 days Acoustic Mine
Global Stats
Naval mines damage: +20%

Aerial minelaying[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Aerial Minelaying Aerial Minelaying 1942 170 days Acoustic Mine
Upgrades
Naval Bombers
Minelaying: 0.05
Tactical Bombers
Minelaying: 0.08
Strategic Bombers
Minelaying: 0.13
Aerial Minesweeping Aerial Minesweeping 1944 170 days Pressure Mine
Upgrades
Naval Bombers
Minesweeping: 0.10
Tactical Bombers
Minesweeping: 0.15

Submarine minelaying[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Minelaying Submarine Minelaying Submarine 1922 170 days Contact Mine
Unlocks
Minelaying Tubes Minelaying Tubes
Minelaying: 1.0 Production Cost.png Production Cost: 90
Torpedo-tube Mine Deployment Torpedo-tube Mine Deployment 1940 170 days Minelaying Submarine
Upgrades
Submarines
Minelaying: +20%

Without Man the Guns[edit]

The naval research tree without Man the GunsMan the Guns activated.

The Naval technology research tree unlocks new ships and technologies related to naval invasions. It can be found between the land doctrine and naval doctrine tabs in the research interface. There are a total 31 different technologies within the naval tree: 28 ship classes organized into seven types and three naval transport technologies. Note that the first naval transport technology, Transport Ship, is required to execute naval invasions. Also note that a blue diamond on a ship's portrait indicates that it is a capital ship; capital ships are designed to sink enemy ships in surface battles and are capable of providing shore bombardment except for aircraft carriers which provide bombardment via their close air support (CAS) planes.

Destroyers[edit]

The lightest screening vessel. Screens are very important because they defend the larger ships from enemy small ships that can carry torpedoes (torpedoes have a lower hit chance but when they hit they do a ton of damage on large ships). Destroyers are cheap screens that can evade large caliber fire, add anti-air capabilities, and let you detect and neutralize submarines.

Icon (generic) Technology Year Base
cost
Prerequisites Description Effects
Destroyer I Destroyer I 1922 127.5
To ensure the safety of convoys, the destroyers of the Great War must be repurposed and developed. Arming vessels with more torpedoes will allow more opportunities to engage.
Unlocks Destroyer I
Destroyer II Destroyer II 1936 170 Destroyer I
Longer torpedo range and faster reload speeds, along with new types of armaments such as anti-air turrets, will allow our destroyers to remain efficient and versatile.
Unlocks Destroyer II
Destroyer III Destroyer III 1940 170 Destroyer II
To better face threats from above and below, new destroyers must be outfitted with radar and modern anti-air and anti-submarine weaponry.
Unlocks Destroyer III
Destroyer IV Destroyer IV 1944 170 Destroyer III
The modern destroyer must be fitted with a variety of different detection technologies, new depth charge deployment systems and be built at a larger scale than their predecessors.
Unlocks Destroyer IV

Cruisers[edit]

Light Cruiser - A light screening vessel. Cruisers are good at taking out other screens. Its primary duty is to shield capital ships from enemy light ships that carry torpedoes, but it can also unleash powerful torpedoes that are capable of hurting bigger ships if they get close enough.

Heavy Cruiser - A large armored cruiser that is pretty flexible. A good choice for nations who can't afford to build larger capital ships. Heavy cruisers can take a lot of hits and carry a lot of firepower.

Icon (generic) Technology Year Base
cost
Prerequisites Description Effects
Light Cruiser I Light Cruiser I 1922 127.5
Maneuverable light cruisers that can maintain a high speed will continue to be useful for scouting missions.
Unlocks Light Cruiser I
Light Cruiser II Light Cruiser II 1936 170 Light Cruiser I
or
Heavy Cruiser II
Post-war treaties put restrictions on cruisers, but well-armed light vessels can be developed while remaining within these limits.
Unlocks Light Cruiser II
Light Cruiser III Light Cruiser III 1940 170 Light Cruiser II
or
Heavy Cruiser III
Now skirting the limits of treaties, larger and more heavily armored cruisers can be built, still with light enough weaponry to be classified as light cruisers.
Unlocks Light Cruiser III
Light Cruiser IV Light Cruiser IV 1944 170 Light Cruiser III
or
Heavy Cruiser IV
Tactically employed to protect larger ships, the modern generation of light cruisers can shake off most past restrictions and be better armed to handle aerial attacks.
Unlocks Light Cruiser IV
Heavy Cruiser I Heavy Cruiser I 1922 127.5
The Washington Naval Treaty was set up to prevent an arms race in cruisers, among other ships, but this seems inevitable. By keeping armor light, the weapons load can be increased.
Unlocks Heavy Cruiser I
Heavy Cruiser II Heavy Cruiser II 1936 170 Light Cruiser II
or
Heavy Cruiser I
Despite new efforts at treaties, refitting lighter cruisers with heavier weaponry remains efficient, although armor is still limited.
Unlocks Heavy Cruiser II
Heavy Cruiser III Heavy Cruiser III 1940 170 Light Cruiser III
or
Heavy Cruiser II
As restrictions are increasingly ignored worldwide, more balanced heavy cruiser designs with more priority on armor can be built. Better anti-air guns allow these ships to cooperate in naval air warfare.
Unlocks Heavy Cruiser III
Heavy Cruiser IV Heavy Cruiser IV 1944 170 Light Cruiser IV
or
Heavy Cruiser III
Upscaled, longer and heavier designs with rapid-fire armaments are features in these final stages of heavy cruiser development.
Unlocks Heavy Cruiser IV

Battlecruisers[edit]

A large capital ship often with offensive abilities close to those of a battleship, but weaker armor traded for faster speed. Battlecruisers can take a lot of hits and carry a lot of firepower.

Icon (generic) Technology Year Base
cost
Prerequisites Description Effects
Battlecruiser I Battlecruiser I 1922 127.5
The post-war battlecruiser arms race resulted in several heavily armed designs, sacrificing armor for speed compared to battleships.
Unlocks Battlecruiser I
Battlecruiser II Battlecruiser II 1940 170 Battlecruiser I
or
Battleship III
Rebuilt and repurposed battlecruisers continue to outrun even modern battleship designs by lighter protection, but have developed better systems for fire control, detection and aerial defenses.
Unlocks Battlecruiser II

Battleships[edit]

The largest capital ship with the biggest guns and strongest armor that money can buy. Such an expensive investment deserves proper support of smaller screening ships. Battleships can take a lot of hits and carry a lot of firepower.

Icon (generic) Technology Year Base
cost
Prerequisites Description Effects
Battleship I Battleship I 1922 127.5
Considered by some to be a relic of a bygone era of naval warfare, by others as the most impressive ships ever built, no one can deny that these remnants of the battleship arms race constitute some of the most heavily armed and armored vessels ever built.
Unlocks Battleship I
Battleship II Battleship II 1936 170 Battleship I
With improved stability and range, a new generation of battleships improve upon previous designs while remaining within limits stipulated by naval treaties.
Unlocks Battleship II
Battleship III Battleship III 1940 170 Battlecruiser II
or
Battleship II
Thicker armor, stronger engines, a battery of high-caliber guns and improved anti-air capabilities can allow battleships to remain relevant, if correctly employed, in a world where naval warfare is increasingly dominated by aerial support.
Unlocks Battleship III
Battleship IV Battleship IV 1944 170 Battleship III
As the world sees what may be the last major battleship confrontations, the importance of heavy armaments and anti-air turrets is greater than ever.
Unlocks Battleship IV
Super-Heavy Battleship I Super-Heavy Battleship I 1936 170 Battleship II
The current state of the world no longer has any room for abiding by naval treaties. Without these limitations, we can focus entirely on creating the heaviest, most well-armed battleships of all time, able to engage multiple lesser vessels.
Unlocks Super-Heavy Battleship I
Super-Heavy Battleship II Super-Heavy Battleship II 1944 170 Battleship IV
or
Super-Heavy Battleship I
An improvement on our earlier super heavy design with stronger weapons and improved fire control systems.
Unlocks Super-Heavy Battleship II

Carriers[edit]

A capital ship able to carry wings of powerful carrier capable aircraft into battle. Also useful as a floating airfield you can position off the coast of your enemy.

Icon (generic) Technology Year Base
cost
Prerequisites Description Effects
Carrier I Carrier I 1922 127.5
Many military theorists believe that naval aviation is the future. Converting old capital ships and ocean liners to carry aircraft will be the first step towards utilizing these new doctrines.
Unlocks Carrier I
Carrier II Carrier II 1936 170 Carrier I
As work begins on the first keel-up carrier designs, we must ensure that these ships have the range and speed to keep up with the rest of our navy, while respecting the post-war naval treaties.
Unlocks Carrier II
Carrier III Carrier III 1940 170 Carrier II
Improved construction methods and more specialized systems like deck edge elevators allow these carriers to transport more planes more efficiently.
Unlocks Carrier III
Carrier IV Carrier IV 1944 170 Carrier III
With many naval treaties now increasingly ignored, we can proceed to build carriers capable of transporting more planes than ever to secure air superiority cover.
Unlocks Carrier IV

Submarines[edit]

The role of the submarine is to hunt down enemy shipping and not have to challenge a superior enemy fleet directly to hurt them. Submarines employ stealth and powerful torpedoes to destroy enemy convoys. Submarines can also fill a role in regular fleet combat should the enemy be low on submarine detection. A submarine starts out hidden and is either spotted if it gets too close to a destroyer or after firing a torpedo after which it will try to escape. It won't be an effective weapon against an enemy with a proper fleet, but unescorted capital ships won't have much defense.

The goal of the submarine is primarily to attack your enemy's economy by preying on convoy routes. For example:

  • Attacking convoys along an enemy trade route will deny them foreign resources.
  • A nation split across the globe like Britain must convoy home resources to their capital area from many places in its empire to use them, making them vulnerable to submarine raiding.
  • When receiving lend lease, convoys carrying equipment can be sunk and will be lost forever.
  • When deploying troops on foreign theaters of war a nation must ferry supply and reinforcement equipment to them. By taking out these convoys their troops will be weaker and easier to defeat.
  • Troops being transported or during a planned invasion may be attacked leading to them being wiped out or severely weakened. You always want to be very careful and guard your transport routes before sending troops somewhere in war time.
Icon (generic) Technology Year Base
cost
Prerequisites Description Effects
Submarine I Submarine I 1922 127.5
Submarines are stealthy vessels designed to take out undefended convoys. The early models from the Great War pave the way for new methods of naval warfare.
Unlocks Submarine I
Submarine II Submarine II 1936 170 Submarine I
Better armed and more stable, new submarine designs are made to take advantage of advancements in naval tactics and have longer range, being able to attack distant convoy routes.
Unlocks Submarine II
Submarine III Submarine III 1940 170 Submarine II
The role of the submarine in the fleet outside of convoy attacks is still under debate. Achieving a balance between combination of speed, range and weaponry will be key to the necessary model.
Unlocks Submarine III
Submarine IV Submarine IV 1944 170 Submarine III
Increased test depth and efficient layouts will be features of the modern submarines, taking advantage of field experience to select appropriate armaments and engines.
Unlocks Submarine IV

Transports[edit]

Icon Technology Year Base cost Prerequisites Description Effects
Transport Ship Transport Ship 1922 127.5
Ship designed solely for troop movement, without any defensive capabilities.
  • Troop convoy requirements: -50%
  • Naval Invasion Capacity: +10
Landing Craft Landing Craft 1940 170 Transport Ship
Dedicated invasion craft make landing in hostile territory slightly less of a headache.
  • Invasion Preparation Time: -50%
  • Invasion Defense: +15%
  • Naval Invasion Capacity: +40
Advanced Landing Craft Advanced Landing Craft 1944 170 Landing Craft
Advanced Landing craft means that our boys can get on the beach quicker and more effectively during an invasion.
  • Invasion Defense: +50%
  • Naval Invasion Capacity: +100
  • Amphibious invasion speed: +25%



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