A specialised American submarine could approach the Soviet Union and raise sensors above the surface to listen to radio signals. Its task was to collect and map information rather than launch a strike. The capability is recalled as one of the specialised roles lost after the Cold War when it was considered less necessary. No particular submarine is identified.
Notable Point · 44:50-45:16
Submarines listening near the Soviet coast
An unnamed Cold War American submarine illustrates the intelligence role of covertly monitoring radio signals close to an opponent.