HALS of group of buildings on an island, snowboat moving into channel between buildings and another island, negotiating stretch of water. ZOOM OUT with appraoching snowboat. Cut to snowboat moving between islands through water. HAS of machine moving at speed and follow. HALS of snowboat heading toward camera on water. HALS of same heading away from camera, moving onto sheet of ice and away behind an island. Interior shot of cabin of snowboat, park warden in profile. TILT DOWN to hands on controls. PAN from profile to propeller engine in stern of boat. Shot of engine. Cut to shot of frozen river seen through the windshield of the snowboat, wooded banks.