Little correction in your example: The second pair of letters “FN” corresponds to a 100 x 100 Km square = 10,OOO square Km. NOT 100,000square meters (that’s a very big difference). 100,000 square meters is a surface of ± 318 x 318 meters far away of the 100 x 100 KM or 10,00 square Km. If you stay in that 100 x 100 Km square you also can ignore the FN letters. But if you go outside of your UTM-zone (in the video 10T) than you have the problem with the pair of letters that do not connect to the previous zone. For that you need a table to find the right letters or you really have to know the MGRS coordinate system very, very, very well. Knowing that table by heart is so difficult maybe even impossible. If you have the connecting map then you should be able to find those letters on the map (if they are printed on it). If not, Succes.

@@ervano798 Oh, I get where the disconnect comes from. I mean square as a grid square, not as in the area of a square. The second pair of letters in MGRS is commonly referred to as a 100,000m square identifier.

They give you water and ammo. That's probably about it

What parts went into your NVGs?

@@Soapy_Sophie612 Nothing expensive, a camera module with IR filter removed connected to a small monitor and a controll board with a rechargable battery. It's not sensitive so i use an extra IR illuminator. Despite it's low component cost it can record both audio and video for many hours, and is so small i have it fitted to my neck guard, an additional benefit to such a setup is not having additional weight on my helmet. Of course i have the screen well covered from the sides to avoid light leaks.