Naval doctrine
Naval doctrine is a technology group that allows a nation to specialize the way its navy conducts naval warfare. The doctrine tree consists of three exclusive branches that provide different bonuses. Each individual doctrine has a base time to research of 200 days.
Contents
- 1 Doctrine branches
- 2 Definitions and terminology
- 3 List of all doctrines
- 3.1 Fleet in Being
- 3.1.1 Fleet In Being
- 3.1.2 Battlefleet Concentration
- 3.1.3 Convoy Sailing
- 3.1.4 Submarine Operations
- 3.1.5 Subsidiary Carrier Role
- 3.1.6 Convoy Escorts
- 3.1.7 Undersea Blockade
- 3.1.8 Hunter Killer Groups
- 3.1.9 Escort Carriers
- 3.1.10 Convoy Interdiction
- 3.1.11 Floating Fortress
- 3.1.12 Integrated Convoy Defense
- 3.1.13 Submarine Offensive
- 3.1.14 Floating Airfield
- 3.1.15 Grand Battlefleet
- 3.2 Trade Interdiction
- 3.2.1 Trade Interdiction
- 3.2.2 Raider Patrols
- 3.2.3 Carrier Operations
- 3.2.4 Convoy Interdiction
- 3.2.5 Capital Ship Raiders
- 3.2.6 Convoy Sailing
- 3.2.7 Unrestricted Submarine Warfare
- 3.2.8 Battlefleet Concentration
- 3.2.9 Subsidiary Carrier Role
- 3.2.10 Wolfpacks
- 3.2.11 Floating Fortress
- 3.2.12 Naval Air Operations
- 3.2.13 Advanced Submarine Warfare
- 3.2.14 Floating Airfield
- 3.2.15 Combined Operations Raiding
- 3.3 Base Strike
- 3.3.1 Base Strike
- 3.3.2 Convoy Escorts
- 3.3.3 Submarine Operations
- 3.3.4 Carrier Primacy
- 3.3.5 Escort Patrols
- 3.3.6 Undersea Blockade
- 3.3.7 Carrier Task Forces
- 3.3.8 Convoy Sailing
- 3.3.9 Convoy Interdiction
- 3.3.10 Floating Airfield
- 3.3.11 Integrated Convoy Defense
- 3.3.12 Submarine Offensive
- 3.3.13 Massed Strikes
- 3.3.14 Floating Fortress
- 3.3.15 Carrier Battlegroups
- 3.1 Fleet in Being
- 4 Comparison table by unit
Doctrine branches[edit]
- Fleet in Being: "A strong fleet focused around battleships means that we are a force to be reckoned with when deployed at sea."
This is the well-rounded general purpose set of naval doctrines that most substantial navies used. It enhances Search & Destroy for capital ships, submarine detection for screening ships, and bonuses for all classes, although subs seem least favored. This is the most powerful doctrine for surface action. It is the most efficient in responding to the escort needs of convoys and in anti-submarine warfare.
- Trade Interdiction: "Against a stronger naval opponent we can focus on tying up their fleet and destroying supply lines to starve their war machine."
This is an offensive doctrine focusing on attacking enemy convoys with coordinated stealthy surface and submarine raiders that have superior abilities to find and destroy enemy shipping while evading enemy detection. Such stealthiness can also be valuable in normal combat or escaping from it, which is usually the best course. Submarines are made very dangerous to the enemy. The trade-off under this doctrine is that light cruisers and destroyers have mediocre anti-submarine warfare capabilities and weak escort efficiency bonuses, so vulnerable friendly shipping may require more effort to defend. Germany adopted the raiding strategy in its efforts in both world wars to strangle Great Britain by cutting off its shipping, but this can also be suitable for minors seeking a naval presence to strike enemy trade with moderate risk and expense.
- Base Strike: "With a strong focus on carriers and their support, no enemy will be outside our reach, whether on land or at sea."
This is similar to the approach of Japan and the United States. It focuses on blue water navy carriers and their light cruiser and destroyer screens, with submarines also receiving decent bonuses for supporting carrier operations. There are no class-specific bonuses at all for battleships, battlecruisers or heavy cruisers, but if built they share the array of global bonuses under this doctrine. Having at least a few fast heavy cruisers that can keep pace with the carriers for bombardment and surface action is advisable, but it is possible to focus just on research and production of carriers, screens and carrier aircraft to make the best use of limited resources.
Some nations start the game with a pre-enabled naval doctrine:
Doctrine | Countries |
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Note: It's possible to change doctrine throughout the game, but all bonuses from the old doctrine are lost, as if completely abandoned, when starting research of a different doctrine tree.
Definitions and terminology[edit]
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This section may contain outdated information that is inaccurate for the current version of the game. The last version it was verified as up to date for was 1.5. |
- Capital ship attack Capital ship attack is a value that represents a capital ship's firepower or damage capability due to it's gun size, quantity, rate of fire, etc. This value adds a positive modifier to the "to hit" dice of a large friendly ship. The higher the number, the better. Reference naval combat details.
- Submarine attack Submarine attack is a value that represents ??? (placeholder)
- Submarine defense Submarine defense is a value that represents ??? (placeholder)
- Sortie efficiency: Sortie (sorties are air missions launched from an aircraft carrier) efficiency represents the speed of refueling and rearming planes on a carrier during battle. A higher sortie efficiency rating results in greater numbers of carrier based planes (not land based) joining in a fight. Sortie efficiency typically starts at 50% (reference Defines NNavy BASE_CARRIER_SORTIE_EFFICIENCY = 0.5) meaning that only half of your carrier planes may fly at the same time. Sortie efficiency can be increased via Naval doctrines and by adding a Navy Carrier specialist (+10%), Navy Carrier expert (+15%), or Navy Carrier genius (+20%) to your military staff.
List of all doctrines[edit]
Fleet in Being[edit]
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This section may contain outdated information that is inaccurate for the current version of the game. The last version it was verified as up to date for was 1.7. |

Fleet In Being
- Battleship, Battlecruiser, Heavy Cruiser:
- Light Cruiser, Destroyer:
- Fleet: Naval minelaying efficiency +10%

Convoy Sailing
- Destroyer: Organization +10
- Destroyer: sub detection +5%
- Fleet: Escort efficiency +5%

Submarine Operations
- Submarine: Organization +10
- Submarine: surface detection +5%
- Submarine: Torpedo reveal chance -5%

Subsidiary Carrier Role
- Carrier: Organization +10
- Carrier Planes: Sortie efficiency +10%

Convoy Escorts
- Destroyer: Organization +10
- Destroyer: sub detection +5%
- Fleet: Escort efficiency +10%

Undersea Blockade
- Submarine: Organization +10
- Submarine: surface detection +20%

Hunter Killer Groups
- Destroyer: Organization +20
- Destroyer: sub detection +10%
- Light Cruiser: Organization +10
- Light Cruiser: sub detection +20%
- Fleet: Escort efficiency +5%

Escort Carriers
- Fleet: Escort efficiency +15%
- Carrier: sub detection +25%

Convoy Interdiction
- Submarine Organization +10
- Submarine: surface detection +5%
- Submarine: raiding efficiency +5%
- Submarine: Torpedo reveal chance -10%

Floating Fortress
- Battleship: Organization +20
- Capital ship: armor +10%

Integrated Convoy Defense
- Destroyer: Organization +20
- Destroyer: sub detection +10%
- Light Cruiser: Organization +10
- Light Cruiser: sub detection +15%
- Carrier: sub detection +25%
- Fleet: Escort efficiency +10%

Submarine Offensive
- Submarine: Organization +10
- Submarine: surface detection +5%
- Submarine: raiding efficiency +10%

Floating Airfield
- Carrier: Organization +20
- Carrier Planes: Sortie efficiency +10%

Grand Battlefleet
- Battleship, battlecruiser, heavy cruiser:
- Organization +20
Trade Interdiction[edit]
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This section may contain outdated information that is inaccurate for the current version of the game. The last version it was verified as up to date for was 1.7. |

Trade Interdiction
- Heavy Cruiser, Light Cruiser, Submarine:
- Organization +10
- surface detection +5%

Raider Patrols
- Heavy Cruiser, Light Cruiser:
- Organization +10
- Surface visibility −10%
- raiding efficiency +15%
- surface detection +10%
Not only submarines can hunt.

Carrier Operations
- Carrier: Organization +20
- Planes: Naval targeting +10%

Convoy Interdiction
- Submarine Organization +10
- Submarine: surface detection +5%
- Submarine: raiding efficiency +5%
- Submarine: Torpedo reveal chance -10%

Capital Ship Raiders
- Fleet: Enemy fleet size penalty +10%
- Battleship, battlecruiser:
- Organization +10
- Surface visibility BB -25% BC −20%
- raiding efficiency BB +50% BC +15%
- surface detection BB +25% BC +15%

Convoy Sailing
- Destroyer: Organization +10
- Destroyer: sub detection +5%
- Fleet: Escort efficiency +5%

Unrestricted Submarine Warfare
- Submarine: surface detection +10%
- Submarine: raiding efficiency +5%
- Submarine: attack +10%

Subsidiary Carrier Role
- Carrier: Organization +10
- Carrier Planes: Sortie efficiency +10%

Wolfpacks
- Submarine: Organization +10
- Submarine: surface detection +10%
- Submarine: raiding efficiency +15%
- Submarine: Torpedo reveal chance -15%

Floating Fortress
- Battleship: Organization +20
- Capital ship: armor +10%

- Carrier: Organization +10
- Planes: Naval targeting: +10%

Advanced Submarine Warfare
- Submarine: Organization +10
- Submarine: surface detection +10%
- Submarine: raiding efficiency +20%
- Submarine: HP +20%

Floating Airfield
- Carrier: Organization +20
- Carrier Planes: Sortie efficiency +20%

Combined Operations Raiding
- Battlecruiser, Heavy Cruiser, Light Cruiser Submarine:
- Organization +10
- surface detection BC,CA,CL +15% SS +10%
- raiding efficiency BC,CA,CL +25% SS +5%
Base Strike[edit]
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This section may contain outdated information that is inaccurate for the current version of the game. The last version it was verified as up to date for was 1.7. |

Base Strike
- Carrier: Organization +20
- Planes: Port strikes +50%

Convoy Escorts
- Destroyer: Organization +10
- Destroyer: sub detection +5%
- Fleet: Escort efficiency +10%

Submarine Operations
- Submarine: Organization +10
- Submarine: surface detection +5%
- Submarine: Torpedo reveal chance +5%

Carrier Primacy
- Carrier: Organization +20
- Carrier Planes: Sortie efficiency +10%
- Planes: Naval targeting +10%

Escort Patrols
- Fleet: Escort efficiency +10%
- Light cruiser, destroyer:
- Organization +10
- sub detection DD +5% CL +10%

Undersea Blockade
- Submarine: Organization +10
- Submarine: surface detection +10%

Convoy Sailing
- Destroyer: Organization +10
- Destroyer: sub detection +5%
- Fleet: Escort efficiency +5%

Convoy Interdiction
- Submarine: Organization +10
- Submarine: surface detection +5%
- Submarine: raiding efficiency +5%

Floating Airfield
- Carrier: Organization +20
- Carrier Planes: Sortie efficiency +20%

Integrated Convoy Defense
- Destroyer: Organization +20
- Destroyer: sub detection +10%
- Light Cruiser: Organization +10
- Light Cruiser: sub detection +15%
- Carrier: sub detection +25%
- Fleet: Escort efficiency +10%

Submarine Offensive
- Submarine: Organization +10
- Submarine: surface detection +5%
- Submarine: raiding efficiency +10%

Massed Strikes
- Carrier: Organization +20
- Carrier overcrowding −20%
- Carrier Planes: Sortie efficiency +20%
- Planes: Naval targeting +20%

Floating Fortress
- Battleship: Organization +20
- Capital ship: armor +10%
Comparison table by unit[edit]
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This section may contain outdated information that is inaccurate for the current version of the game. The last version it was verified as up to date for was 1.72. |
Doctrine | Organization | Surface Detection | Raiding Efficiency | Attack | HP% |
---|---|---|---|---|---|
Fleet in Being | +40 | +25% | +15% | ||
Trade Interdiction | +50 | +50% | +50% | +10% | +20% |
Base Strike | +40 | +25% | +15% |
Doctrine | Organization | Surface Detection | Sub Detection |
---|---|---|---|
Fleet in Being | +60 | +10% | +30% |
Trade Interdiction | +10 | +5% | |
Base Strike | +50 | +25% |
Doctrine | Organization | Surface Detection | Sub Detection | Surface Visibility | Raiding Efficiency
|
---|---|---|---|---|---|
Fleet in Being | +20 | +10% | +35% | ||
Trade Interdiction | +30 | +30% | -10% | 50% | |
Base Strike | +60 | +25% |
Doctrine | Organization | Surface Detection | Raiding Coordination |
---|---|---|---|
Fleet in Being | +40 | ||
Trade Interdiction | +40 | +30% | +50% |
Base Strike |
Doctrine | Organization | Surface Detection | Surface Visibility | Raiding Coordination |
---|---|---|---|---|
Fleet in Being | +40 | |||
Trade Interdiction | +40 | +40% | -20% | +50% |
Base Strike |
Doctrine | Organization | Surface Detection | Surface Visibility | Raiding Coordination |
---|---|---|---|---|
Fleet in Being | +60 | |||
Trade Interdiction | +50 | +25% | -25% | +50% |
Base Strike | +20 |
Doctrine | Organization | Naval Air Agility* | Sortie Efficiency | Carrier Overcrowding | Sub Detection |
---|---|---|---|---|---|
Fleet in Being | +30 | +30% | +50% | ||
Trade Interdiction | +60 | +30% | |||
Base Strike | +120 | +10% | +50% | +30% |
- Applies only to airplanes based on carriers
Doctrine | Naval Targeting |
Port Strikes | Naval AA Attack (All Ships) |
Capital ship attack |
Capital ship armor |
Minelaying Efficiency |
Escort Efficiency |
Strikeforce Org Loss |
Torpedo Reveal Chance |
Enemy Fleet Size Penalty |
---|---|---|---|---|---|---|---|---|---|---|
Fleet in Being | +10% | +10% | +10% | +20% | +45% | +20% | -15% | |||
Trade Interdiction | +20% | +10% | +15% | +20% | -25% | +10% | ||||
Base Strike | +40% | +50% | +10% | +30% | -15% |