Maritime control: PAN right to left and reverse of Maritime control board, representation of seaway. Slightly rough DOLLY of board in background, office workers in foreground at desks, backs turned to camera. Reverse DOLLY. DOLLY MCU of series of markers on master wall chart, flickering red and green lights. Cut to MCU of flickering red and green lights. ZOOM OUT from MCU of plotter pen of X-Y plotter to include machine and operator. ZOOM back IN, ZOOM and CU slightly unsteady. LS of girl entering and sitting at teletype as X-Y plotter operator sits in foreground. Steep HAS of girls fingers typing. ¾ front view of girl at machine.