w777,
Yes, I see now it is not a displaced threshold - I wasn't paying attention to the markings on Google Earth!
I agree with you - on a 3° glidepath, you would be 85' over the wall - definitely a chance of turbulence and sink in a strong wind.
I pay particular attention to these issues, having spent many hours in gliders, where unanticipated sink on final can ruin your whole day. In really strong winds, we fly faster and higher and NEVER fly downwind of the threshold. On base, we track at a right-angle to the threshold or upwind of it.
PS I've found a nice write-up in section 9.11 of this paper:
http://www.recreationalflying.com/tu...umodule21.html