NVGS setup and prep A night vision device isn’t just a device – it is merely just one component of an entire system. A lot of issues with Night Vision devices that impact marksmanship as well as durability in terms of its usage over a long period of time could easily be prevented by a simple check before is usage. Why do I call it a system? Well, the use of an NV device requires a helmet, a montage system of several parts, an IR pointer/illuminator and additional accessories that have to work in