Try that on a deeply dark night...at 2500 feet AGL in a non-sas'ed (sasless) aircraft...for extended periods of time....over a unique spot on the ground....with about 10 feet variance allowed on horizontal movement...and 50 feet vertically...on NVG's. Pointed the FLIR straight down and used the Co-pilot to call drift. Made for some good fun....not...but a real challenge.
