Talk:Fall 2017 Event/@comment-103.199.42.138-20171120071721/@comment-31265343-20171120080238

In general, Kancolle events have ship locking rules, for medium and hard difficulties. Each map has its own map colours. Ships will be tagged the colour of the first map that they participate in. After that, ships that are tagged may only participate in maps that share the same tag colour.

If you're playing on easy mode, there is nothing to worry about.