Combat Mechanics

Ammunition
On maps with overworld segments, your fleet will have an ammunition limited indicated on the top of the screen.



Each enemy encounter consumes 20% of your ammunition, with fleet damage greatly reduced at 0%. On maps with 6 or more enemy fleets, there will usually be a supply pickup somewhere on the map, which will replenish 30% of your ammunition reserves. This effect can be increased by ships with special skills, like Tenryuu.

Combat Grade
The game grades your combat performance from F to SS depending on how well you perform. As of April 27, 2020, grading criteria for all maps are the same. Requirements are cumulative in that all conditions below a grade have to be fulfilled to achieve said grade.

SS: Clear the map with two or less ships at heavy damage (red health) S: Clear the map with 20 seconds or more remaining A: Clear the map without losing any ships B: Sink the enemy fleet F: Fail to sink the enemy fleet



Danger Level/Battle Skip
Maps that have an overworld mode have a danger level that changes the more times you clear the map. The more times you clear the map, the "safer" it becomes and enables the ability to skip non-boss battles if certain conditions are met (running into the enemy automatically nets your fleet a victory without consuming ammunition). A special cut-in will play upon skipping a battle.



Note: Danger level automatically decreases to 1 when completing a map with a 3★ rating

Fleet Conditions
Each world (1-1, 2-1, 3-1, 4-1, E1, etc.) has its own condition to enable battle skips. Each ship in your fleet that meets this condition will enable a single battle skip, up to the number dictated by your current danger level. For example, if 4-2 is at danger level 2 and there are 3 BC/BB in the fleet, only 3 battle skips will be enabled. Similarly, if the fleet has 6 BC/BB, it will only skip 4 battles.