| The only time we were unable to work outside was during the whiteout which occurred at the end of January. |
| It is possible that weather conditions near the accident site may have included cloud and lighting conditions conducive to whiteout. |
| When a pilot enters whiteout conditions, he appears to be engulfed in a uniformly white glow. |
| In the whiteout it is difficult to see far enough ahead to be able to plan a route. |
| Just before the helicopter touched down, the pilot lost his visual reference in whiteout conditions and blowing snow. |
| The first officer probably had difficulty perceiving depth because of the whiteout. |
