It's not very likely they'll ever find her. The sub sank in a very deep part of the ocean, and considering the manner in which subs usually go down (i.e. implode from the pressure) it's probably in a pretty poor shape. Not very many wrecks this small tend to be located that deep, and even with radar searches it's unlikely to be easily identifiable as a U-boat, let alone a specific boat. I think there's almost no chance the boat will ever be found, and even if it's found, it's improbable that will yield any clues as to how it sank.
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