Docking (repair) will restore your ships to full health, at the expense of time, fuel and steel.
Repair time
[math]\displaystyle{ \text {Total repair time} = \text {HP loss} \times \text {base repair time} \times \text {ship type multiplier} + \text {30 seconds} }[/math] [math]\displaystyle{ \text {Base repair time} = \text {Level} \times 10 \text {(if Level } \le \text {11); } \text {Level} \times 5 + floor (\sqrt {Level - 11}) \times 10 + 50 \text { (if Level } \ge \text {12)} }[/math]
| Ship Type | Multiplier |
|---|---|
| Battleships, Aviation Battleships, Aircraft Carriers, Repair Ships | 2 |
| Heavy Cruisers, Aviation Cruisers, Fast Battleships, Light Aircraft Carriers, Submarine Tenders | 1.5 |
| Light Cruisers, Destroyers, Submarine Aircraft Carriers, Seaplane Tenders, Amphibious Assault Ships, Torpedo Cruisers | 1 |
| Submarines | 0.5 |
Repair cost
[math]\displaystyle{ \text {Fuel cost} = floor(\text {Base fuel cost} \times \text {HP loss} \times 0.032) }[/math]
[math]\displaystyle{ \text {Steel cost} = floor\text {Base fuel cost} \times \text {HP loss} \times 0.06), }[/math]
where base fuel cost is the amount of fuel needed to resupply that ship from 0 to full.
The cost is rounded down when using dry docks, so most destroyers and submarines with only 1 HP loss can be repaired for free.
The cost is not affected by the level of the ship.
| Ship Repair Cost per HP (assuming max remodel level) | |||
|---|---|---|---|
| Type | Class | Cost | |
|
| ||
| Destroyers | Shimakaze Amatsukaze Akitsuki Z1-class |
0.64 | 1.2 |
| Others | 0.48 | 0.9 | |
| Light Cruisers | Ooyodo | 1.12 | 2.1 |
| Agano-class | 0.96 | 1.8 | |
| Others | 0.8 | 1.5 | |
| Torpedo Cruisers | (all) | 0.8 | 1.5 |
| Heavy Cruisers | Furutaka-class Aoba-class |
1.12 | 2.1 |
| Tone-class Kai Myoukou-class Kai Ni |
1.44 | 2.7 | |
| Prinz Eugen | 1.76 | 3.3 | |
| Others | 1.28 | 2.4 | |
| Aviation Cruisers | (all) | 1.6 | 3 |
| Battleships | Ise-class Fusou-class |
2.72 | 5.1 |
| Nagato-class Kongou-class |
3.2 | 6 | |
| Bismarck zwei | 3.36 | 6.3 | |
| Bismarck drei | 3.52 | 6.6 | |
| Vittorio Veneto-class | 4.16 | 7.8 | |
| Yamato-class | 8 | 15 | |
| Aviation Battleships | Ise-class Kai | 3.04 | 5.7 |
| Fusou-class Kai Ni | 3.36 | 6.3 | |
| Submarines | (all) | 0.3 | 0.8 |
| Submarine Aircraft Carriers | I-401 | 0.8 | 1.5 |
| Others | 0.32 | 0.6 | |
| Seaplane Tenders | Chitose-class | 1.12 | 2.1 |
| Akitsushima | 1.6 | 3 | |
| Light Aircraft Carriers | Houshou | 0.96 | 1.8 |
| Ryuuhou | 1.12 | 2.1 | |
| Shouhou-class Ryuujou |
1.28 | 2.4 | |
| Chitose-class Carrier Hiyou-class |
1.44 | 2.7 | |
| Aircraft Carriers | Unryuu-class | 1.6 | 3 |
| Shoukaku-class | 2.08 | 3.9 | |
| Hiryuu Souryuu |
2.24 | 4.2 | |
| Akagi | 2.4 | 4.5 | |
| Kaga | 2.56 | 4.8 | |
| Taihou | 2.88 | 5.4 | |
| Submarine Tenders | Taigei | 1.12 | 2.1 |
| Amphibious Assault Ships | Akitsumaru | 1.44 | 2.7 |
| Repair Ships | Akashi | 1.7 | 3.3 |
| Training Cruisers | Katori | 1.12 | 2.1 |
| Collaboration Ships | SS Iona | 4.8 | 9 |
| CA Takao | 5.6 | 10.5 | |
| BB Haruna | 6.4 | 12 | |
| Type | Class |
|
|
Full list of rounded ship class cost: Wikiwiki
Examples
Example 1: Level 67 Kongou Kai with 41/75 HP (34 damage):
- Base repair time:
- [math]\displaystyle{ 67 \times 5 + floor(\sqrt {67 - 11}) \times 10 + 50 = 335 + 7 \times 10 + 50 = \text {455 seconds} }[/math]
- Repair time:
- [math]\displaystyle{ 34 \times \text{455 seconds} \times 1.5 + \text{30 seconds} = \text{23235 seconds or 6:27:15} }[/math]
- Resource costs:
- [math]\displaystyle{ floor(90 \times 34 \times 0.06) = \text{183 steel} }[/math]
- [math]\displaystyle{ floor(90 \times 34 \times 0.032) = \text{97 fuel} }[/math]
Example 2: Level 150 Musashi Kai with 1/106 HP (105 damage):
- Base repair time:
- [math]\displaystyle{ 150 \times 5 + floor(\sqrt {150 - 11}) \times 10 + 50 = 750 + 11 \times 10 + 50 = \text {910 seconds} }[/math]
- Repair time:
- [math]\displaystyle{ 105 \times \text{910 seconds} \times 2.0 + \text{30 seconds} = \text{191130 seconds or 53:05:30} }[/math]
- Resource costs:
- [math]\displaystyle{ floor(250 \times 105 \times 0.06) = \text{1575 steel} }[/math]
- [math]\displaystyle{ floor(250 \times 105 \times 0.032) = \text{840 fuel} }[/math]
- This is the highest in the game currently.
Notes
- While a ship is being repaired in the docks:
- You cannot cancel that repair (you must wait the full duration or use an Instant Repair to vacate that dock slot)
- You cannot modify equipments, modernize the ship, or remodel the ship.
- If a ship ends repair with 39 morale or less, it will be set to 40. This includes repairs ended by using Instant Repair.
- You can shave off the last minute of repair time by switching to the docking screen when a ship has less than one minute of repair time to go.
- You start the game with two repair dock slots—you can pay money (DMM points) to buy keys in the shop and expand to 3 or 4 slots. (The key is also used to unlock construction dock slots.)
- To use buckets to instantly finish repairs use the green button (shown to the right) or activate the slider on the repair confirmation window.
- If the player has Akashi, she can also repair ships (subject to limitations). See here for details.