I concur The Hunt for Red October - both the movie and the book - was really great. Particularly all the stuff about the sonar ops. My favorite being "Jonesy's" hearing the Soviets singing, as they disappeared into the depths with their (quieter) Caterpillar Drive.
I am sure the real USS Dallas was used for the exterior shots (the helicopter drop) in that movie - but was her actual interior used for the control-room and sonar shack shots, as well?
Yet another in your latest string of just excellent posts - Bravo Zulu, Don!