Naval technology

From Hearts of Iron 4 Wiki
Jump to navigation Jump to search

Naval research tree
Naval research tree.png

With Man the Guns[edit]

Light Ships[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 Suface Detection: 20.0
Sub Detection: 1.0 Suface Visibilaty: 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
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
Basic Destroyer Hull
Service Manpower: 325 Suface Detection: 20.0
Sub Detection: 1.0 Suface Visibilaty: 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
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
Improved Destroyer Hull
Service Manpower: 400 Suface Detection: 20.0
Sub Detection: 1.0 Suface Visibilaty: 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
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
Advanced Destroyer Hull
Service Manpower: 500 Suface Detection: 20.0
Sub Detection: 1.0 Suface Visibilaty: 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
Max Speed: 5.0 kn Max Speed: +47%
Reliability: −20% Fuel Usage: 10.0
Production Cost.png Production Cost: 170.00
Smoke Generators Smoke Generators 1922 63 days Early Destroyer Hull
Global stats
Fleet speed while retreating: +20%

Anti Submarine[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Basic Depth Charges Basic Depth Charges 1922 127 days Early Ship Hull Light
Unlocks
Depth charge 1.png 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
Passive Sonar Passive Sonar 1922 127 days Early Ship Hull Light
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

Cruisers[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Early Light cruiser Early Light Cruiser 1922 127 days
- Steel.png
Early Cruiser Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Basic Light Cruiser Basic Light Cruiser 1936 127 days Early Ship Hull Cruisers
- Steel.png
Basic Cruiser Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Improved Light Cruiser Improved Light Cruiser 1940 127 days Basic Ship Hull Cruisers
- Steel.png
Improved Cruiser Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --


Advanced Light Cruiser Advanced Light Cruiser 1944 127 days Improved Ship Hull Cruisers
- Steel.png
Advanced Cruiser Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Improved Airplane Launcher Improved Airplane Launcher 1936 63 days Early Ship Hull Cruisers
Unlocks
Airplane launcher 2.png Ship Airplane Launcher II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Cruiser Armor Scheme Basic Cruiser Armor Scheme 1936 106 days Basic Ship Hull Cruisers
Unlocks
File:Uknown.png Ship Armor Cruiser II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Cruiser Armor Scheme Improved Cruiser Armor Scheme 1940 106 days Basic Cruiser Armor Scheme
Unlocks
File:Uknown.png Ship Armor Cruiser III
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Advanced Cruiser Armor Scheme Advanced Cruiser Armor Scheme 1944 106 days Improved Cruiser Armor Scheme
Unlocks
File:Uknown.png Ship Armor Cruiser IV
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --

Heavy Ships[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Early Battleship Early Battleship 1922 148 days
- Steel.png
Early Heavy Ship Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Basic Battleship Basic Battleship 1936 127 days Early Ship Hull Heavy
- Steel.png
Basic Heavy Ship Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Super Heavy Ship Super Heavy Ship 1936 127 days Basic Ship Hull Heavy
- Steel.png
--
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Improved Heavy Ship Hull Improved Heavy Ship Hull 1940 127 days Basic Ship Hull Heavy
- Steel.png
Improved Heavy Ship Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Advanced Battleship Advanced Battleship 1944 127 days Basic Ship Hull Heavy
- Steel.png
Advanced Heavy ShipHull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Basic Heavy Armor Scheme Basic Heavy Armor Scheme 1936 106 days Early Ship Hull Heavy
Unlocks
File:Uknown.png Ship Armor BB II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Heavy Armor Scheme Improved Heavy Armor Scheme 1940 106 days Basic Heavy Armor Scheme
Unlocks
File:Uknown.png Ship Armor BB III
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --

Carriers[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Early Carrier Early Carrier 1922 148 days
- Steel.png
Early Carrier Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Basic Carrier Basic Carrier 1936 127 days Early Ship Hull Carrier
- Steel.png
Basic Carrier Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Improved Carrier Improved Carrier 1940 127 days Basic Ship Hull Carrier
- Steel.png
Improved Carrier Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Advanced Carrier Advanced Carrier 1944 127 days Improved Ship Hull Carrier
- Steel.png
Advanced Carrier Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --

Torpedo Warfare & Submarines[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Basic Torpedo Basic Torpedo 1922 170 days
Unlocks
2x 450mm Torpedo Tubes
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Magnetic Detector Magnetic Detector 1936 212 days Basic Torpedo
Unlocks
Torpedo Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Homing Torpedo Homing Torpedo 1942 212 days Magnetic Detector
Unlocks
Torpedo Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Electric Torpedo Electric Torpedo 1940 212 days Magnetic Detector
Unlocks
Naval Torpedo Reveal Chance Factor
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Ship Torpedo Launcher Improved Ship Torpedo Launcher 1936 127 days Basic Torpedo
Unlocks
2x 533mm Torpedo Tubes
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Advanced Ship Torpedo Launcher Advanced Ship Torpedo Launcher 1940 127 days Improved Ship Torpedo Launcher
Unlocks
3x 533mm Torpedo Tubes
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Modern Ship Torpedo Launcher Modern Ship Torpedo Launcher 1944 127 days Advanced Ship Torpedo Launcher
Unlocks
4x 533mm Torpedo Tubes
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Early Submarine Early Submarine 1922 127 days Basic Torpedo
- Steel.png
Early Submarine Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Basic Submarine Basic Submarine 1936 127 days Early Ship Hull Submarine
- Steel.png
Basic Submarine Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Improved Submarine Improved Submarine 1940 170 days Basic Ship Hull Submarine
- Steel.png
Improved Submarine Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Advanced Submarine Advanced Submarine 1940 170 days Improved Ship Hull Submarine
- Steel.png
Advanced Submarine Hull
Service Manpower: -- Suface Detection: --
Sub Detection: -- Suface Visibilaty: --
Depth Charges: -- Max Speed: -- kn
Max Range: -- km HP: --
Reliability: --% Fuel Usage: --
Production Cost.png Production Cost: --

Unlocks
-- Shp Engine
Max Speed: -- kn Max Speed: +--%
Reliability: −--% Fuel Usage: --
Production Cost.png Production Cost: --
Basic Submarine Snorkel Basic Submarine Snorkel 1940 85 days Basic Ship Hull Submarine
Unlocks
File:Uknown.png Ship Sub Snorkel I
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Submarine Snorkel Improved Submarine Snorkel 1944 170 days Basic Submarine Snorkel
Unlocks
File:Uknown.png Ship Sub Snorkel II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --

Armaments[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Basic Battery Basic Battery 1922 85 days
Unlocks
File:Uknown.png Ship Light Battery I
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Light Battery Basic Light Battery 1936 85 days Basic Battery
Unlocks
File:Uknown.png Ship Light Battery II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Light Battery Improved Light Battery 1940 85 days Basic Light Battery
Unlocks
File:Uknown.png Ship Light Battery III
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Advanced Light Battery Advanced Light Battery 1944 85 days Improved Light Battery
Unlocks
File:Uknown.png Ship Light Battery IV
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Light Shell Basic Light Shell 1936 127 days Basic Light Battery
Unlocks
Lg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Light Shell Improved Light Shell 1942 127 days Basic Light Shell
Unlocks
Lg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Medium Battery Basic Medium Battery 1936 85 days Basic Battery
Unlocks
File:Uknown.png Ship Medium Battery II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Medium Battery Improved Medium Battery 1940 85 days Basic Medium Battery
Unlocks
File:Uknown.png Ship Medium Battery III
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Advanced Medium Battery Advanced Medium Battery 1944 85 days Improved Medium Battery
Unlocks
File:Uknown.png Ship Medium Battery IV
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Medium Shell Basic Medium Shell 1936 127 days Basic Medium Battery
Unlocks
Lg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Medium Shell Improved Medium Shell 1942 127 days Basic Medium Shell
Unlocks
Lg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Heavy Battery Basic Heavy Battery 1936 85 days Basic Battery
Unlocks
File:Uknown.png Ship Heavy Battery II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Heavy Battery Improved Heavy Battery 1940 85 days Basic Heavy Battery
Unlocks
File:Uknown.png Ship Heavy Battery III
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Advanced Heavy Battery Advanced Heavy Battery 1944 85 days Improved Heavy Battery
Unlocks
File:Uknown.png Ship Heavy Battery IV
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Heavy Shell Basic Heavy Shell 1938 127 days Basic Heavy Battery
Unlocks
Hg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Heavy Shell Improved Heavy Shell 1942 127 days Basic Heavy Shell
Unlocks
Hg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Basic Secondary Battery Basic Secondary Battery 1922 68 days
Unlocks
File:Uknown.png Ship Secondaries I
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Secondary Battery Improved Secondary Battery 1936 68 days Basic Secondary Battery
Unlocks
File:Uknown.png Ship Secondaries II
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Dp Secondary Battery Dp Secondary Battery 1940 68 days Improved Secondary Battery
Unlocks
File:Uknown.png Dp Ship Secondaries
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --

Damage Control[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Damage Control I Damage Control I 212 days
Unlocks
Critical Receive Chance
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Damage Control II Damage Control II 212 days Damage Control I
Unlocks
Critical Receive Chance
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Damage Control III Damage Control III 212 days Damage Control II
Unlocks
Critical Receive Chance
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --

Fire Control Methods[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Fire Control Methods I Fire Control Methods I 212 days
Unlocks
Lg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Fire Control Methods II Fire Control Methods II 212 days Fire Control Methods I
Unlocks
Lg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Fire Control Methods III Fire Control Methods III 212 days Fire Control Methods II
Unlocks
Lg Attack
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --

Mines[edit]

Icon (generic) Technology Year Base cost Prerequisites Description Statistics
Basic Naval Mines Basic Naval Mines 1922 170 days
Unlocks
File:Uknown.png Ship Mine Layer I
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Submarine Mine Laying Submarine Mine Laying 1922 170 days Basic Naval Mines
Unlocks
File:Uknown.png Ship Mine Layer Sub
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Submarine Mine Laying Improved Submarine Mine Laying 1940 170 days Submarine Mine Laying
Unlocks
Mines Planting
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Improved Naval Mines Improved Naval Mines 1936 170 days Basic Naval Mines
Unlocks
Naval Mines Damage Factor
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Degaussing Degaussing 1938 85 days Improved Naval Mines
Unlocks
Naval Mines Effect Reduction
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Advanced Naval Mines Advanced Naval Mines 1942 170 days Improved Naval Mines
Unlocks
Naval Mines Damage Factor
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Airdrop Mines Airdrop Mines 1942 170 days Advanced Naval Mines
Unlocks
Mines Planting
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Modern Naval Mines Modern Naval Mines 1945 170 days Advanced Naval Mines
Unlocks
Naval Mines Damage Factor
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --
Airsweep Mines Airsweep Mines 1944 170 days Modern Naval Mines
Unlocks
Mines Sweeping
--: -- --: --
--: -- --: --
--: -- --: --
--: -- --: --
--: --

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

Both with and without Man the Guns[edit]

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%



Politics IdeologyFactionNational focusIdeasGovernmentPuppetDiplomacyWorld tensionCivil warOccupationIntelligence agency
Production TradeProductionConstructionEquipmentFuel
Research and technology ResearchInfantry technologySupport Companies technologyArmor technologyArtillery technologyLand doctrineNaval technologyNaval doctrineAir technologyAir doctrineEngineering technologyIndustry technology
Military and warfare WarfareLand unitsLand warfareDivision designerArmy plannerCommand groupCommanderBattle planCombat tacticsShipNaval warfareAircraftAir warfareExperienceAttrition and accidentsLogisticsManpowerNuclear bomb
Map MapProvinceTerrainWeatherState
Events Events