I wonder how much just ONE of those things cost, pray tell. Scanning for mine's in the Chesapeake Bay? I hope they put the mines out there as a 'training exercise and they're not 'left overs' from WWII.
Last time I heard, they had a hard enough time finding crabs, in the Chesapeake Bay, never mind mines and submarine drone 'robots'...
Then again, there's a 12 foot long 7600 pound hydrogen bomb WITH it's nuclear capsule and plutonium trigger, that was lost off of Tybee Island, Georgia sea coast in a 1958 crash of a B47 bomber that has never been located---maybe they can send us some help there! They're still looking for it-->
http://en.wikipedia.org/wiki/1958_Tybee_Island_B-47_crashAnd I've caught a fishing lure I've lost on another, second line and caught the same fish twice in that same general ocean area, so go figure...