[Johnny B.]

At one point during the Reagan administration, it was decided to let the Soviets know just how good our submarine tracking abilities were. So our attack subs, all over the world, at the exact same time, pinged every Russian missile sub.

Over the course of the following weeks and months, as each sub returned to base and reported on their missions, the Russians slowly came to the realization that every one of their subs were being successfully tracked.

LINK

[Pan_Yan]

Interesting story. Thanks for posting the link.