Title:RP 40/41 AUTO SYSTEM PART 2: THE OIL SERVO UNIT [Main Title]
Film Number:DRN 2381B
Other titles:
Summary: Naval instructional film on the Oil Servo Unit (OSU), part of the RP 40/41 Auto System used to convert electrical signals from the gun director into mechanical movement to train and elevate the 4.5 inch twin turret of a Leander Class frigate. Shows gun turret and control system in HMS Andromeda (F.57).