Night Vision Goggles (NVGs) are binocular devices that enhance
unaided night vision for pilots. Typically, NVGs are mounted on a
pilot's helmet. This position enables pilots to look through the
goggles outside the cockpit or under the goggles at flight
instruments. By enabling the pilot to see in the dark, NVGs have
the potential to improve the safety of visual flight at night. In
most conditions, night vision goggles provide pilots with a
significant increase in the quality of visual information compared
with unaided night vision. They allow the pilot to see the horizon,
objects, terrain and weather more easily. Furthermore, they assist
the pilot to maintain spatial orientation, to avoid hazards such as
inadvertent Instrument Meteorological Conditions (IMC) entry, and
to visually navigate.