衍生型

Equipment variants are concrete, country-specific classes of equipment which are based on an equipment type. They may include customizations such as design companies, upgrades, or modules.

Base

When a country unlocks an equipment type by researching the corresponding technology, a base variant of it gets created. Where applicable, it uses the design company the country has at that moment. It is not necessary to already have the design company when the research starts.

Upgrade

1. 重定向 Template:SVersion

Several types of equipment can be further upgraded using experience. Upgraded variants may be created of tanks, tank-based weapons, airplanes and ships using experience to upgrade specific attributes. Sometimes a small improvement in speed, protection, or firepower can make a significant difference in the field.

Variants are expensive in XP, so their use should take into account the expected benefit, production volume, and service lifetime of the variant in deciding where to commit these resources. This is especially important for capital ships, as they take a very long time to build and there are large year-gaps between models.

Each upgrade may be selected up to five times and may be made at different times. Existing equipment upgrades may be viewed in the Production screen. Upgrades in one area may reduce performance in another area - e.g., complexity reducing reliability or increased weight-reducing speed. Note that land units may use maintenance support companies that increase reliability for equipment in that division, and also that equipment stats and performance may also be affected by government staff with particular skills that provide modifiers.

For land equipment, the first upgrade level costs 10 experience, for air and naval equipment it costs 25. Each subsequent level costs 5 experience more.

With

1. 重定向 Template:图标 naval equipment upgrades are not available, as ship classes are designed using modules instead.

List of land equipment upgrades

Upgrade	Types	Bonuses	Penalties
Armor	all armor	重定向 Template:绿字 Armor || 重定向 Template:红字 Speed 重定向 Template:红字 Reliability
Engine	all armor	重定向 Template:绿字 Speed ||
Reliability	all armor	重定向 Template:绿字 Reliability ||
Tank Gun	Tank	重定向 Template:绿字 Soft Attack 重定向 Template:绿字 Hard Attack 重定向 Template:绿字 Piercing || 重定向 Template:红字 Speed 重定向 Template:红字 Reliability
AA Gun	Self-propelled AA	重定向 Template:绿字 Air Attack || 重定向 Template:红字 Speed 重定向 Template:红字 Reliability
AT Gun	Tank destroyer	重定向 Template:绿字 Soft Attack 重定向 Template:绿字 Hard Attack 重定向 Template:绿字 Piercing || 重定向 Template:红字 Speed 重定向 Template:红字 Reliability
Artillery	Self-propelled artillery	重定向 Template:绿字 Soft Attack || 重定向 Template:红字 Speed 重定向 Template:红字 Reliability

List of naval equipment upgrades

Upgrade	Types	Bonuses	Penalties
Gun	CL CA torpedo cruiser heavy ships	重定向 Template:绿字 Light Attack 重定向 Template:绿字 Light Piercing 重定向 Template:绿字 Heavy Attack 重定向 Template:绿字 Heavy Piercing || 重定向 Template:红字 Max Speed 重定向 Template:红字 Reliability
Torpedo	torpedo cruiser DD	重定向 Template:绿字 Torpedo attack || 重定向 Template:红字 Max Speed 重定向 Template:红字 Max Range
Armor	CA, heavy ships	重定向 Template:绿字 Armor || 重定向 Template:红字 Speed
Engine	CV, heavy ships CL, CA, torpedo cruiser	重定向 Template:绿字 Speed 重定向 Template:绿字 Max Range || 重定向 Template:红字 Reliability
Engine	DD	重定向 Template:绿字 Speed 重定向 Template:绿字 Max Range ||
Reliability	CV, heavy ships, SS CL, CA, torpedo cruiser	重定向 Template:绿字 Reliability || 重定向 Template:红字 Max Range
Anti-Air	CL, DD	重定向 Template:绿字 Anti-air|| 重定向 Template:红字 Max Speed
ASW	DD	重定向 Template:绿字 Sub Detection 重定向 Template:绿字 Depth Charge || 重定向 Template:红字 Torpedo Attack
Torpedo	SS	重定向 Template:绿字 Torpedo attack || 重定向 Template:红字 Max Speed
Stealth	SS	重定向 Template:绿字 Sub Visibility || 重定向 Template:红字 Max Speed
Engine</span	SS	重定向 Template:绿字 Max Speed 重定向 Template:绿字 Max Range || 重定向 Template:红字 Sub Visibility 重定向 Template:红字 Reliability
Deck Space	CV	重定向 Template:绿字 Deck Space || 重定向 Template:红字 Armor
Armor	CV	重定向 Template:绿字 Armor 重定向 Template:绿字 HP || 重定向 Template:红字 Deck Space

List of air equipment upgrades

Upgrade	Types	Bonuses	Penalties
Weapons	(jet/heavy) fighter, rocket interceptor	重定向 Template:绿字 Air Attack || 重定向 Template:红字 Speed 重定向 Template:红字 Reliability 重定向 Template:红字 Agility
Weapons	carrier fighter	重定向 Template:绿字 Air Attack || 重定向 Template:红字 Speed 重定向 Template:红字 Reliability 重定向 Template:红字 Agility
Range	all non-carrier types	重定向 Template:绿字 Range || 重定向 Template:红字 Reliability
Range	all carrier types	重定向 Template:绿字 Range || 重定向 Template:红字 Reliability
Engine	all	重定向 Template:绿字 Speed 重定向 Template:绿字 Agility ||
Reliability	all	重定向 Template:绿字 Reliability ||
Attack	NAV	重定向 Template:绿字 Naval Attack || 重定向 Template:红字 Reliability
Attack	carrier NAV	重定向 Template:绿字 Naval Attack || 重定向 Template:红字 Reliability
Bombing	(jet) strategic bomber	重定向 Template:绿字 Bombing || 重定向 Template:红字 Reliability 重定向 Template:红字 Range
Bombing	(jet) TAC	重定向 Template:绿字 Bombing 重定向 Template:绿字 Ground Attack || 重定向 Template:红字 Reliability 重定向 Template:红字 Agility
Attack	(carrier) CAS	重定向 Template:绿字 Air Attack 重定向 Template:绿字 Ground Attack || 重定向 Template:红字 Reliability 重定向 Template:红字 Agility

Module

Modules extend the capabilities of an equipment variant in a more detailed manner than upgrades. Ship hulls as the basic equipment types offer a number of module slots that can be used. Without

1. 重定向 Template:图标, researched ship equipment types automatically combine ship hulls and a standard configuration of modules that cannot be changed. With
2. 重定向 Template:图标, the hulls and modules are researched individually and by spending naval experience are combined in the ship designer.

Statistics

参见：Equipment#Statistics

The statistics of an equipment variant are based on the underlying equipment type, its design company, and upgrades or modules. Additive and averaged additive stats from modules are added to the stats of the equipment type. Multiplicative module stats as well as designer and upgrade stats stack additively among each other and are then applied as one factor.

For example if Japan has Mitsubishi as its air design company (+20% agility, +10% speed) while completing research on the 1940 fighter equipment type (agility 65), the resulting equipment variant (Ki-43 Hayabusa) has 65 * 120% = 78 agility. If Japan upgrades this variant with five points into Engine upgrade (5 * 5%), the resulting variant Ki-43 Hayabusa Kai A has 65 * 145% = 94.25 agility.