Reply to post: We could track your subs in the 80s.

We could track your subs in the 80s.

No, he means to within a few 10s of metres.

That tracking is within a few 10s of Kilometres.

And in a hot war those passive sonar arrays (and their shore bases) would be some of the first casualties.

"Under Siege" maybe a laughable Steven Segal shoot-em-up but it's quite realistic about that.