The query is not about the technology itself but the way it will be used. Knowing the weather minima that crews will be permitted to work down to is hardly likely to be a state secret. Neither is the distance they have to remain from obstructions or the basis for their height calculations.
So come on, as P3B and Same Again have suddenly gone all shy, someone answer those very basic NVG ops questions please. Or alternatively admit that you are way way way behind the curve when it comes to NVG and it's highly questionable whether you'll be able to conduct night overland SAR Ops come April.