Ship's speed can take the following values:
- Slow (低速)
- Fast (高速)
- Fast+ (高速+)
- Fastest (最速)
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.
- Note, however, that this doesn't change ship types, initially slow BB and BBV (ship types 9 and 10) can have fast speed, but still aren't FBB (ship type 8).
- Devs claim that higher speed values increase evasion. However, its magnitude/scope/existence is still investigated by players (preliminary tests suggest that there is no significant increase in evasion[1][2]).
- Fast+ and Fastest speed values allow BB and BBV to be used in the CTF/STF escort fleet.
| Speed and engine synergy
|
| +13 boilers
|
+10 boilers
|
Group/Speed
|
Equipment
evasion
|
Slots
required
|
| Fast A
|
Fast B1
|
Fast B2
|
Fast C
|
Slow A
|
Slow B
|
Slow C
|
| 0
|
1
|
Fast+
|
Fast+
|
Fast+
|
Fast+
|
Fast
|
Fast
|
Fast
|
16
|
2
|
| 0
|
2
|
Fastest
|
Fast+
|
Fast+
|
Fast+
|
Fast
|
Fast
|
Fast
|
26
|
3
|
| 0
|
3
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
Fast+
|
Fast
|
36
|
4
|
| 0
|
4
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
Fast+
|
Fast
|
46
|
5
|
| 1
|
0
|
Fastest
|
Fast+
|
Fast+
|
Fast+
|
Fast
|
Fast
|
Fast
|
19
|
2
|
| 1
|
1
|
Fastest
|
Fastest
|
Fast+
|
Fast+
|
Fast+
|
Fast
|
Fast
|
29
|
3
|
| 1
|
2
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
39
|
4
|
| 1
|
3
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
49
|
5
|
| 2
|
0
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fast+
|
Fast+
|
Fast
|
32
|
3
|
| 2
|
1
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
42
|
4
|
| 2
|
2
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
52
|
5
|
| 3
|
0
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
45
|
4
|
| 3
|
1
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
55
|
5
|
| 4
|
0
|
Fastest
|
Fastest
|
Fastest
|
Fast+
|
Fastest
|
Fast+
|
Fast
|
58
|
5
|
| Simplified table
|
| Speed Increment
|
Required Boiler
|
Fast A
|
Fast B1
|
Fast B2
|
Fast C
|
Slow A
|
Slow B
|
Slow C
|
| +1 |
Any boiler
|
1
|
| +2 |
Either |
+13 boilers
|
1 |
2 |
2 |
N/A |
2 |
2 |
N/A
|
| Or |
+13 boilers, and
|
0 |
1 |
0 |
1 |
0
|
| Total boiler count
|
2 |
2 |
3 |
2 |
2
|
| +3 |
Either |
+13 boilers
|
N/A |
3 |
N/A
|
| Or |
+13 boilers, and
|
1
|
| Total boiler count
|
3
|
| Speed groups
|
| Initial speed
|
Group
|
Ships, classes, types
|
| Destroyers |
Light Cruisers |
Heavy Cruisers |
Battleships |
Carriers |
Others
|
| Fast
|
A
|
Shimakaze |
|
Tone-class Class, Mogami-class Class |
|
Taihou, Shoukaku-class Class |
|
| B1
|
Amatsukaze |
Agano-class Class |
|
Kongou-class Class, Iowa |
Souryuu, Hiryuu, Unryuu, Amagi |
|
| B2
|
Others |
Other CL, CLT |
Others |
Other FBB |
Fast CVL, Akagi, Katsuragi |
|
| C
|
|
Yuubari |
|
|
Kaga |
Fast AV
|
| Slow
|
A
|
|
Yamato-class Class |
|
| B
|
|
CT |
|
Other BB, BBV |
Slow CVL |
Slow AV, AS
|
| C
|
|
SS, SSV, LHA, AR, AO
|