海军学说

钢铁雄心 IV

海战

海军

海军单位

海军学说是一个科技组，允许一个国家专门化其海军进行海战的道路。科技树由三种提供不同奖励的独占分支组成。

海军学说科技树

基础研究时间

每个单独的学说条目需要255天的基础研究时间，通过花费100次海军经验，研究速度可提高100%。所有其他的研究速度修正都可以加成到这个科技上。
研究时间实例：
100的海军经验提供100%的研究速度加成。
同时自由贸易法案提供10%的研究速度加成,
则最后的研究所需时间
[math]\displaystyle{ \text{研究时间} = 255 / (1 + 100\% + 10\%) = 255 / 2.1 \approx 121 \text{ days} }[/math]

学说分支

存在舰队：“一支以战列舰为核心的强大舰队意味着我方在海上不容被忽视。”

这是大多数海军使用的一套全面的通用海军学说。它增强了主力舰的索敌和摧毁能力，屏卫舰的对潜探测能力，但还有对所有舰船通用的增益，虽然潜艇似乎不受偏爱。这是水面作战时最有力的学说，也是对反潜作战和相应护航需求最有效的。

贸易封锁： “应对强势敌海军时，我方可以着眼于让敌舰队陷入疲惫并打击补给线来敌方的战争机器陷入困顿。”

这是一个具有攻击性的理论，重点是在于协调秘密的水面舰艇和潜艇袭击者来攻击敌人的运输船队，有优越的能力在躲避敌方舰队侦察时发现敌方并摧毁敌方船只。这种能力在正常交战和逃避交战中都十分的有价值，这通常是最好的办法。潜艇对敌人来说会非常的危险。由于这个海军学说，轻巡洋舰和驱逐舰的反潜作战能力一般，护航效率加成较弱，因此脆弱的友军舰艇可能需要付出更多的努力来防御。德国在两次世界大战中都采取了突袭战略，通过切断英国的航运来扼杀英国，也适合海军小国以中等风险和费用袭击敌方贸易路线以寻求海军存在。

基地打击： "大幅侧重于航母与其支援，无论在海洋或是陆地都没有我方触及不到的敌人。"

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
Base Strike	日本美利坚合众国
Fleet in Being	澳大利亚英属马来亚英属印度加拿大中华民国法国意大利新西兰南非苏维埃联盟联合王国
Trade Interdiction	德意志国

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

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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.

全部学说列表

存在舰队

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Fleet In Being

Battleship, Battlecruiser, Heavy Cruiser:

Organization +10

Light Cruiser, Destroyer:

Surface detection +10%

Fleet: Naval minelaying efficiency +10%

Ships stay in port where they are safer and only engage enemies at opportune moments. The presence of our ships will make enemies more reluctant to take our ports.

Battlefleet Concentration

Battleship, Battlecruiser, Heavy Cruiser:

Organization +10

Fleet: Strike Force Org loss +10%

Call in nearby ships as soon as an enemy vessel is spotted. Coordinated focused fire quickly render enemy ships useless. Hunt them down one by one.

Convoy Sailing

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

Introducing compulsory convoy sailing will make it easier to spot enemy raids and respond in time. Safety in numbers is the way to go.

Submarine Operations

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

We do not need to engage the enemy fleet head on to win the war. Strike at their trade convoys before they can react and disappear below the surface again. You cannot fight what you cannot see.

Subsidiary Carrier Role

Carrier: Organization +10
Carrier Planes: Sortie efficiency +10%

Carriers support Battleships, improving their readiness in switching from defense to offense. The utility of the Carrier as both an eye in the sky and powerful quick strikeforce complement the slower Battleships well.

Convoy Escorts

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

Fast surface ships as part of our convoys will allow us to spot enemy submarines and respond in time. Detection is they key to eliminating the submarine nuisance.

Undersea Blockade

Submarine: Organization +10
Submarine: surface detection +20%

Submarines are the perfect tool for cutting of the enemy's inflow of important raw materials. We will cripple the enemy's production and win by starving them out.

Hunter Killer Groups

Destroyer: Organization +20
Destroyer: sub detection +10%
Light Cruiser: Organization +10
Light Cruiser: sub detection +20%
Fleet: Escort efficiency +5%

Destroyers form groups to hunt down enemy submarines. The combined efforts of scouting and hunting specialists make a fantastic killing team.

Escort Carriers

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

The area covered by a Carrier's aircraft makes escorting trade convoys a much easier task. Securing the flow of resources is essential.

Convoy Interdiction

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

Improved coordination of our submarines will let them strike at trade convoys en route. Disrupting the enemy's supply lines will give us the strategic advantage.

Floating Fortress

Battleship: Organization +20
Capital ship: armor +10%

With battleships on highest alert we will always be prepared to respond if the enemy dares threaten our waters. Any fleet needs a solid foundation and the power of the battleship is unparallelled.

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%

Better navy and air coordination allow us to strike at enemies from miles away before they are near our trade convoys. This will drastically increase the effectiveness of convoy sailing.

Submarine Offensive

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

Reaching the pinnacle of communication between our submarines allows them to go on the offensive. Let us destroy the enemy trade convoys faster than they can replace them.

Floating Airfield

Carrier: Organization +20
Carrier Planes: Sortie efficiency +10%

Improved integration of Carriers into our fleet keeps us prepared to strike from both sea and air. It is key that we dominate the air wherever we go.

Grand Battlefleet

Battleship, battlecruiser, heavy cruiser:

Organization +20

Fleet: Naval AA attack +10%

Fleet: Naval minelaying efficiency +10%

Capital ship: attack +10%

Leadership training allow our commanders to keep calm in the heat of battle even when commanding immense fleets. Our fleet will crush any opposition head on.

贸易封锁

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Trade Interdiction

Heavy Cruiser, Light Cruiser, Submarine:

Organization +10
surface detection +5%

The sooner we spot the enemy ships, the sooner we can destroy them. Hit their trade convoys and escape before they have time to react.

Raider Patrols

Heavy Cruiser, Light Cruiser:

Patrols of both fast and gun heavy ships leave the enemy trade convoys nowhere to hide.
Not only submarines can hunt.

Carrier Operations

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

Carriers will allow our pilots to strike at sea faster and easier than from our airbases on land. We will strike before they have time to react.

Convoy Interdiction

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

Improved coordination of our submarines will let them strike at trade convoys en route. Disrupting the enemy's supply lines will give us the strategic advantage.

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%

With our most powerful ships on the hunt for trade convoys, the enemy will no longer find safety in numbers. They are sitting ducks praying we will not find them.