Thank you for the quick answer. :)
You might want to consider adding this issue to the Revised FAQ/Errata (just using the wording on the AA50 manual would do it). This issue turns up every once in a while on forums.
Can an attacking submarine immediately submerge before combat begins considering there is no enemy destroyer like in A&A Europe?
To prevent opposing transport from loading/offloading.
No. In AARevised (unlike AAEurope and AAPacific) an attacking sub must survive one round of combat first and can only submerge if there is no defending DD present. In other words, there is no “substalling” in AARevised.
SS
Thank you SS.