[Psycluded]

Ugh... the way it reads, the CO and Officer of the Deck were simply not communicating well with the sonar room. The instant the signal-to-noise ratios rose, it should have been reported, so Fire Control's attention could be called to it. TFOW could have then determined that his range estimates were incorrect and reported it to the conn.

Bad case of miscommunication, resulted in some deaths. The skipper is taking responsibility, as he should, though.