Not always, if they do a swim out launch rather than a ram launch then there's less transients, and if the surrounding sonar environment is quite noisy then the launching boat could feasibly hide its position longer than expected. Of course, the escorts will not stop until the attacking boat is destroyed and the SSK will have a limited amount of time it can stay down before they need to snorkel, although the new AIP boats have much longer and if they settle down near some wreckage or in a secluded spot where the bottom bounce of the active sonar helps to mask the sub. Even so, there's a good chance it'll be a one way mission.
Alternatively, in an active combat scenario with nuclear release authorised, then a sub could use a nuclear torpedo to wreck the CVBG. The subsequent white-out of the sonar picture and the chaos caused might enable the attacker to slip away.
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