Board Thread:Questions and Answers/@comment-32306613-20170616162304/@comment-26155909-20170616181521

Since you just started maybe you don't know it yet: the absolute most important thing in Kancolle is never advance when one of your ship is heavily damaged (red icon, life under 25%).

This is because the only way to sink a ship is to enter a battle when she is already heavily damaged.

Also, always remember to heartlock new ships and equipements as soon as you get them if you intend to keep them, when locked they won't appear in the scrapping menu, it's a good way to avoid tragedies.