Sequence showing test drilling in progress. LS and CUs of drill setup. CU of hands of engineer feeling test core. Shot of drill being pulled out of hole. HAS over seaway model. Shot of map of seaway, hands coming in and out of frame, pointing, holding map. Shot of model in vicinity of Galop Island. Shot of sign advertising seaway model. Shot of men at draughting table. Bow on LS of steaming lake freighter. GROUND TO AIR SHOT of Sikorsky helicopter hovering. GROUND TO AIR MLS of helicopter taking off slowly. LS of mild rapids. GROUND TO AIR LS of helicopter. Various MSs of engineers manning various measuring devices. MS of water in rapid.