@Ranor:
A destroyer prensent in the seazone only counters the special abilities of the sub, for example it could not move through a seazone containing a dd and it can’t submerge in a battle where an enemy dd still exists. Also the opening fire casulties produced by attacking subs are not removed from battle until the end of the round (together with all the other casulties)so they can retalliate 1 time.
So the diffrence with the example of the AC with 2 Figs is, if the sub hits and no enemy dd is present, the AC is sunk bevor he can defend, but the Figs can retaliate. If the sub survies it can then submerge and this combat end. Now the 2 Fig have a movement of 1 to reach a save landing spot, if none is in reach, they are lost.
you re probably right since the figs are air units and can retaliate always, no matter des is present or not on their side
but when on AC the figs are maybe threated as sea units?? and thatwise cant retaliate in our case
well, as i said i think you re right, maybe Craig Yope or some of the experts, and some of our volk here on the forum( Switch, Jen…) can help( confirm )