Locals are the other Level 40 Fighters you get. they're short range (very short range, run out of fuel quickly), but they do a lot of damage.

when I was using the attacker cv in blitz, I had 3 Tb pilots, plus two Fighter pilots. you keep two fighters (locals) ready on deck at all times then use your TBs to attack targets.

once you master the art of using TBs (fyi, IJN ships have the weakest auto AA defense of the bunch), then you just keep at it.

once you hit level 70, they start to ignore auto AA and you don't get shot down as often when doing torp runs on BBs.

you can also get into using DBs if you wish. some players prefer them.

oh, and in blitz, most importantly, learn to watch what's happening around you using the mini-map. so you don't get overrun by some DD coming at you. and not getting caught up in your bombing runs that you miss any bombers or such coming at you.