Soaring June 1993, article named "Chasing Ghosts". The author said he could see thermals during the day while, training in "The Bag", so he was using the monocle with PNVS. Not sure what PNVS is but it sounds like a combo of night vision and IR?

On Wednesday, October 5, 2016 at 11:27:30 AM UTC-7, Soartech wrote:

I would also like to ask Jonathan St.Cloud to dig up the reference he had about an Apache trainee.