LAMS of two Royal Canadian Air Force crewmen refuelling Canso Catalina aircraft. LACS of two bombs on underside of wing. MLS of men at work on ramp near water, aircraft in immediate foreground. Shots of crewmen in rubber suit wading in water, hauling aircraft wheel, working on underside of aircraft waist deep in water. LACS of propeller rotating. MS of man knee deep in water, easing aircraft in water, ice floating in water. LS of Catalina aircraft taxiing on water. GROUND TO AIR SHOT of Catalina aircraft airborne past camera. CU of RCAF pilot in cockpit, using sextant. GROUND TO AIR SHOTs of Catalina flying past, snow on runway, of US Air Force Boeing B-17 flying past. AIR TO AIR SHOTs of RCAF Catalina PBY-5 Amphibious airborne, flying over snow covered land. AERIAL SHOTs over winter bush covered land, rivers winding through. Rear CS view of two RCAF crewmen in parka attaching bomb to underside of airplane. POV of air base as plane approaches for landing. CUs of dials on control panel of airplane.