Shot of buoy being lowered onto pier. Shots of naval officer using sextant as junior officer watches, CU of young man's face looking in the distance. Shot of buoy at sea, of buoy's light going on and off. Shots of buoy being lift aboard ship, of buoy on ship's deck. CU of 10" dry compass card. Shot of bow of ship sailing fairly rough sea. Shots of sailor in rain gear carrying pole across deck, of starboard railing of ship, of chain being lowered into water, LAS of mast and rigging, rocking movement. TILT UPs from ship's wheel to junior officer steering. HAS inside lighthouse of man and young man looking at machine working, at dials on wall. Shot of machine working. HAS of shadow of lighthouse falling on white house and fence near lighthouse. HALS of calm sea, PAN to rocky shore. MLS of ship silhouetted against sky, smoke pouring off funnel.