GB
With your radar tilt and a whiskey compass they'd have had primary and secondary horizons
....... Oh well.
On a different subject, I note the NTSB prelim on the NorthWest incident came and went without much in the way of comment.
http://www.ntsb.gov/ntsb/GenPDF.asp?id=DCA09IA064&rpt=p
A while back someone flamed the crew's statement that the cockpit temperature and humidity had suddenly risen although I've heard anecdotal tales over the years that reference this phenomenon in the tropics in the upper FL's, albeit in aircraft without the layered automation to make it a significant issue.
Rgds.
24V