Talk:Equipment List (Image)/@comment-24591045-20140228172213/@comment-36.72.109.3-20140821071041

see the combat for detailed answer to your question :

http://kancolle.wikia.com/wiki/Combat

as for did you need it or not, you can suse an AA aircraft instead, or type3 on battleships/heavy cruiser. and even if you don't use em I think your flagship still has this tracer effect, go read the rest at the link I provided '-'7