posted on Nov, 30 2004 @ 01:32 AM
Because most helicopters use auto-rotation as their emergency landing device, the helicopter equivalent of gliding an aeroplane.
In Australia two Blackhawks went down loaded with SAS when they flew into each other on a night-time exercise. The pilots were relying on NVGs for
vision and navigation.
The best description of the difficulty of that is in the book Chinook (I forget the author's name, he's a Brit).
Ever been driving or skiing in fog? When the sun came out I found myself around the back of a mountain I knew intimately. I thought I was carefully
making my way down the main run. I used to ski three days a week for years.
I'm surprised they didn't climb higher. Although if it was uncontrolled airspace and thick fog...would you want to?