Sorry I meant Spatial Disorientation. English is not my native language.....
The link provided by Mad (Flt) Scientist explains it quite well.
There is no delay in the NVG's we use, and they are definitely not a "pleasure" to fly with in the long run since they are quite heavy. The entire CG of the helmet is moved forward when they are donned, and on long missions (3-4 hours), ones nose takes all the added weight.
Last edited by F-16GUY; 14th Mar 2016 at 18:22.