Since, in WAW, subs can withdraw even if destroyers are present, this brings up a question: If the destroyer fails to detect or fails to destroy the sub(s), can the subs freely move out of that sea zone on thier controller's turn, or are they 'trapped' until discovered by the destroyer (or until the subs' controller decides to attack the destroyer)?Q: do destroyers have to detect subs to stop their movement through sea zones the destroyer occupies?
A: No
