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Improving Ship Speed

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By equipping a Turbine and a Boiler it's possible to make fast destroyers like Shimakaze go speeds far beyond fast. As shown here, using a Improved Kanhon Type Turbine and a New Model High Temperature High Pressure Boiler will result in Shimakaze going to Fastest
By equipping a Turbine and a Boiler it's possible to make a Battleship like Yamato go from slow to fast. As shown here, using a Improved Kanhon Type Turbine (shown in the expansion slot) and an Enhanced Kanhon Type Boiler will result in Yamato going to Fast allowing her access to path branching she would otherwise not have access to when she was Slow.

Speed Speed represents the speed of a ship. Ship are either slow (低速) or fast (高速) by default. As of the 10 Jan 2017 Update, ship speed can be further increased to fast+ (高速+) or fastest (最速) by using a combination of Engine Improvement Engine Improvements: a TurbineImproved Kanhon Type Turbine with one or more BoilersEnhanced Kanhon Type Boiler
New Model High Temperature High Pressure Boiler
.

Overview

There are several effects of increasing ship speed:

  • Meeting routing requirements:
    • Fleet speed affect certain map routing.
      • Note that this does not apply to ship type requirements (eg. a BB will not count as an FBB where FBBs are specifically required).
      • Most map routings are only affected by slow/fast fleets, fast+ and fastest being required for routing in very few maps (eg. 3-2 and 4-5).
  • Combined Fleet composition:
    • BB/BBV that are fast+ can be placed in the escort fleet of STF/TCF (only fast for Warspite Kai).
  • Evasion increase.
    • Although this has been stated by the developers to occur, testing has not shown any significant increase in evasion.
  • Because Coastal Defense Ships (DE) cannot equip Engine Improvement Engine Improvements, they are the only ship type that cannot be sped up.

Speed Change Charts

It is highly recommended to have a Reinforcement Expansion on ships that are sped up. Ships sped up without using a RE will have severely degraded combat efficiency.

So far, only 2 types of "boiler" exist in the game, and they are referred to as:

All synergies listed below already include 1 Improved Kanhon Type TurbineImproved Kanhon Type Turbine because it is an absolute requirement for speed ups.

  • 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]).
Speed and engine synergy
+13New Model High Temperature High Pressure Boiler boilers +10Enhanced Kanhon Type Boiler boilers Group/Speed Equipment
evasion
Slots
required
Fast Slow
A B1 B2 C A   B       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+
1 0 Fastest Fast+ Fast+ Fast+ Fast Fast Fast 19 2
1 1 Fastest Fastest Fast+ Fast+ Fast+ Fast Fast 29 3
2 0 Fastest Fastest Fastest Fast+ Fast+ Fast+ Fast 32 3
1 2+ Fastest Fastest Fastest Fast+ Fastest Fast+ Fast 39+ 4+
2 1+ Fastest Fastest Fastest Fast+ Fastest Fast+ Fast 42+ 4+
3+ 0+ Fastest Fastest Fastest Fast+ Fastest Fast+ Fast 45+ 4+
Simplified table
SpeedSpeed Increment Required Boiler Fast A

Fast B1
Slow A
Fast B2
Slow B
Fast C
Slow C
+1 Any boiler 1
+2 Either +13New Model High Temperature High Pressure Boiler boilers 1 2 2 N/A
Or +13New Model High Temperature High Pressure Boiler boilers, and 0 1 0
Total boiler count 2 2 3
+3
(initially-slow
ships only)
Either +13New Model High Temperature High Pressure Boiler boilers N/A 3 N/A
Or +13New Model High Temperature High Pressure Boiler 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 ShimakazeShimakaze · TashkentTashkent Tone-classTone
Chikuma
 · Mogami-classMogami
Mikuma
Suzuya
Kumano
TaihouTaihou · Shoukaku-classShoukaku
Zuikaku
 · Mogami-class CVLSuzuya Carrier Kai Ni
Kumano Carrier Kai Ni
B1 AmatsukazeAmatsukaze Agano-classAgano
Noshiro
Yahagi
Sakawa
Kongou-classKongou
Hiei
Haruna
Kirishima
 · IowaIowa · Yamato Kai NiYamato Kai Ni
SouryuuSouryuu · HiryuuHiryuu · UnryuuUnryuu · AmagiAmagi
B2 Other DD Other CL · CLTKitakami Kai
Ooi Kai
Kiso Kai Ni
 · Yuubari Kai Ni/DYuubari Kai Ni
Yuubari Kai Ni D
Other CA Other FBB Fast CVL · Other CV
C Samuel B. Roberts Mk.IISamuel B. Roberts Mk.II YuubariYuubari KagaKaga Fast AVChitose
Chiyoda
Nisshin
Slow A   Yamato-classYamato
Musashi
 · Nagato-class Kai NiNagato Kai Ni
Mutsu Kai Ni
Houshou Kai Ni/SenHoushou Kai Ni
Houshou Kai Ni Sen
B Samuel B. RobertsSamuel B. Roberts Yuubari Kai Ni TokuYuubari Kai Ni Toku   Other BB · BBV · GangutGangut Slow CVL Slow AVKamoi Kai
Mizuho
Akitsushima
Commandant Teste
 · ASJingei
Chougei
Taigei
 · CTKatori
Kashima
 · Other AOShip Banner Kamoi.png
Ship Banner Kamoi Kai Bo.png
Ship Banner Souya (AGS).png(all forms)
Ship Banner Yamashio Maru.png
 · Shinshuu MaruShinshuu Maru
C   SS · SSV · ARAkashi · HayasuiHayasui · Akitsu MaruAkitsu Maru
Speed exceptions
Ships Speed group Exception Notes
I-201-classI-201
I-201 Kai
I-203
I-203 Kai
Slow C +1 Speed fit bonus with the New Model High Temperature High Pressure BoilerNew Model High Temperature High Pressure Boiler Not self-stackable
Houshou Kai Ni/SenHoushou Kai Ni
Houshou Kai Ni Sen
Slow A
Yuubari Kai Ni TokuYuubari Kai Ni Toku

Samuel B. Roberts/KaiSamuel B. Roberts
Samuel B. Roberts Kai

Slow B Speed set to Fast when equipping a Improved Kanhon Type TurbineImproved Kanhon Type Turbine Not self-stackable

Bonus disabled if equipping any "other" variants of Engine ImprovementEngine ImprovementEnhanced Kanhon Type Boiler
New Model High Temperature High Pressure Boiler
.

  • Regular speed modding behaviors then.

See Also