I just got AAE, and I find the game very exciting to play, but I’m a little confused with the naval rules. I believe I remember that the revised rules of the original AA allowed subs to submerge immediately after a successful attack. Is that so in AAE? Also, can subs attack subs? It seems improbable in 1941, but I’m not sure in game terms. Thanks for any help!

can the sub submerge immediately after hitting, without the chance of the battleship fighting back?