In order for the missiles to fire not at once 4 pieces in one salvo.
All 4 missiles will go to the same splashdown point (very close toeach other). The effectiveness of such an attack is low.
Therefore, the ASROCs will be fired in pairs.
And after some delay in the interval of 3 - 5 minutes.
So that, with a daring second pair of missiles, it can shoot at theplace where you run. 