Underwater adversaries are tracked by a silent, submerged ear that civilian crews hide in the ocean floor to ensure the global sonar network remains invisible and indestructible.
Personnel posed as scientists to mask Soviet submarine tracking, a secret the Navy later modernized into a centralized network to eliminate reporting delays for the fleet.
For decades, the Navy hid a global dragnet under a fake oceanographic cover to track Soviet submarines before shifting its focus to police other nations' coastal waters.
Soviet submarines were tracked by a hidden global acoustic dragnet the government denied for years, a system later bolstered by a $107 million Lockheed Martin contract.