Netcentric underwater warfare; The Remedy for 'Silent Subs'?

Although in most recent crises around the world it would appear from a superficial glance that there was no imminent underwater threat, a closer look shows differently. In the War on Iraq, for instance, a large allied effort was spent on eliminating the very real mine threat that endangered the supply of troops and goods to the harbour of Umm Qasr, even though a large proportion of the mines could be intercepted before they were deployed. Furthermore, the allied naval forces were highly concerned about the Iranian "Kilo" class submarines that easily could have affected operations. Although these submarines did not enter into the war, the possible threat they posed was enough to force a large-scale effort on underwater surveillance.