I was taught to approach and cross a ridge at about 45 Deg angle. So if you got downdraft or another plane coming the other way you only have to turn 45 Deg to avoid crossing if needed. Maybe this is what was involved?
As far as how close to the ground to get downdraft or updraft. I was shocked. My instructor expected me to fly within feet of the side of the valley to get full benifit of the updraft. He did say not to get closer than about 10 feet
(he did say feet dispite being French)
Mountain flying and landing on "imposible" spots - best flying I have ever done
