Cinema: Echoes in The Depths

Aboard a U.S. attack submarine, a technician suddenly clamps on his headphones as bluish-white symbols dance on the cathode-ray screens before him. He is picking up an eerie metallic message: the echoes of a Soviet submarine nosing through the black depths of the Atlantic 40 miles away. A BC- 10 computer "washes" data through its analyzers and, amazingly, tells the technician not only the type of sub he is hearing but the specific vessel.

This technology, like much else portrayed in The Hunt for Red October, is authentic. The U.S. Navy has the capability to track Soviet submarines with just such...

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