ORIGINAL: Dutchie999
ORIGINAL: wild_Willie2
You either use ASW assets at choke points or near assets that need protection, just having them search big swatches of water at random is just stupid.
If you are protecting your own coasts and you can only catch nuclear subs at choke points why do you need a P-8? Permanent sonobuoys transmitting to a listening post on shore is probably far cheaper and a lot safer since big and slow planes are a very easy target. And will probably be the first to be shot down in a preemptive strike.
How do those cheaper, safer listening posts actually localize and kill enemy subs the detect? And what's shooting down your P-8s in a preemptive strike? They are only operated by the US and India, neither of which are particularly susceptible to sudden surprise (non-nuclear) attacks on airbases housing naval patrol squadrons in this day and age.