Partials/Speed system

Ship's speed can take the following values:

Initially, a ship is either slow or fast, the speed can be increased (from slow to fast to fast+ to fastest) using the engine synergy, by equipping a turbine (can be equipped in the expansion slot) and one or more boilers (Enhanced Kanhon Type Boiler and New Model High Temperature High Pressure Boiler) on a ship. The effects are

Increase in speed, slow ships will be fast and will count as fast for branching rules. It is also assumed that fast+ and fastest will have their own branching rules in the future.
Currently, it is unknown if there is an increase in evasion because of a higher speed and/or the engine synergy.

Speed groups
Initial speed	Group	Ships, classes, types
Fast	A	Shimakaze, Taihou, Shoukaku-class Class, Tone-class Class, Mogami-class Class
	B₁	Amatsukaze, Agano-class Class, Souryuu, Hiryuu, Unryuu, Amagi, Kongou-class Class, Iowa
	B₂	DD, CL, CLT, CA, CVL (Fast), FBB, Akagi, Katsuragi
	C	Kaga, Yuubari, AV (Fast)
Slow	A	Yamato-class Class
	B	BB, BBV, CVL (Slow), AV (Slow), CT, AS
	C	SS, SSV, LHA, AR, AO

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