Decoy Launchers on US subs???
 

As i was watching the new screenshots, i have see that at the damage control screen, it appears the "decoy launcher"

I think that the only "decoy" the us sub skippers used was the launching of garbage, personal belongings, fuel oil, etc.... and not decoys as per se.

As far as I know you're correct. SH1 had a button for "Launch Debris".