St. Martin's Press
A DEADLY GAME
U.S. NAVY COMMANDER Roy Hunter, captain of the USS Blackfin, heard the sibilant beat of ships' screws and, through the raised periscope, saw the masts of hull-down Soviet warships. Electronic Signals Measures (ESM) intercepts of radar and radio transmissions had confirmed the presence of several ships and ASW helicopters as well as the high-frequency polarized radar the Soviet helos employed for detecting exposed submarine periscopes and masts.
As he lowered the periscope, Hunter ordered, "Lower all masts. All ahead two-thirds. Make your depth two-five-zero