The North Atlantic—1977. A Knox (FF-1052)-class frigate is working with a P-3C to localize a Soviet nuclearpowered attack submarine (SSN). In the frigate's combat information center, the antisubmarine warfare evaluator and the tactical action officer huddle over the dead-reckoning trace (DRT) while operations specialists work to plot both the ship's sonar tail contact and the sonobuoy pattern being laid by the P-3. Over to one side, an antisubmarine aircraft controller talks to the plane, receiving voice reports of each buoy spit and calling the buoy's location to the plotting team.
Surface Ship ASW: Modern Technology—Outdated Procedures
By Lieutenant David R. Klain, U.S. Navy