@RisingDragon:
All, clarification question - can an attacking sub fire at a defending sub once during the sneak attack phase, prior to the defending sub rolling/submerging? ie if he scores, then the defending sub is sunk before it can submerge?
No. A sub is invincible if there is no enemy destroyer, because it can submerge before each round, including the first. Attacking subs get zero attempts at the defending sub, unless the defending player says he’s not submerging.
Um, it’s here in the errata.
“Q. Exactly when is the decision made whether or not to submerge submarines?”
“A. The decision whether to submerge submarines is made before any dice are rolled by either side in an exchange of fire, and the subs submerge immediately. The attacker decides before the defender does”.