Britain's first atomic submarine Dreadnought goes on trial in the Mediterranean.
GV. Gibraltar Harbour. LV. Britain's first nuclear submarine HMS Dreadnought alongside quay in harbour. Zoom in to conning tower "S.101 Dreadnought". GV. Dreadnought steams out of harbour. GV. Rock of Gibraltar. GV. Dreadnought at sea at speed. SV. Interior of Dreadnought, officer looking through periscope, & CU. GV. Dreadnought surfacing. CU. Sailor at Dreadnought's controls, pan to controls. SV. Pan, Dreadnought at speed, & GV.