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Originally Posted by swimsalot
If a P3 is screening ahead of a TF, that's not much real estate...
And if the Akula at 12 knots is that quiet, what about a KILO at 3?
Or a SW at 4knts?
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You're right.
What you're seeing here is actually echoing a real life debate - how close into shore do you want to bring your warships?
One of the reasons real life COs do not like to go in close to land is that the bad acoustic conditions in the shallows limits their ability to defend themselves from submarines quite severely. It's safer out in the deep where you can expect a convergence zone, maybe more than one. ASW in bottom limited, shallow water is one of the most difficult things one can do.
I think it's interesting that nobody has talked about dropping active buoys. If you can't count on passive detection, start banging away with your active.
There are other things you can do, too. If the task force moves quickly enough, then the P-3 doesn't need to cover as much because the kinematics of the situation insures that the space in which possible submarines might be located and still come within firing range is smaller. Surface ships have the advantage of speed over submarines.
Even then, maybe you just won't be able to cover the area and insure a probability of detection of more than like 0.5, say. If that's the case then maybe you've created a contrived scenario where they wouldn't ever bring a large task force into that area. They'd instead leave it for "expendable" surface combattants. There's lots of different possibilities.