Talk:Combat/@comment-84.0.79.186-20150303134902/@comment-24930367-20150303140303

ASW doesn't have any relation to special attack (double attack/cut-in); it's always single attack at submarine.

One DC and one Sonar (just one set) gives a bonus to ASW attacks, after that it's a matter of putting more ASW (Sonar gives more than DC, plus it gives more accuracy).

And about that 'first weapon', it's actually 'top-most weapon in your slot', in this case it's either gun or torpedo (never Sonar or DC), which only take action if your ship failed her night battle special attack.