AN/PVS-31C BNVD is a compact, lightweight, Gen III high-performance white phosphor dual-tube goggle. The BNVD?s improved white phosphor tube technology allows low-light and nighttime maneuvers to appe... AN/PVS-31C BNVD is a compact, lightweight, Gen III high-performance white phosphor dual-tube goggle. The BNVD?s improved white phosphor tube technology allows low-light and nighttime maneuvers to appear more natural in black and white, with added contrast detail in shapes and shadows providing the operator more visual information for assessment and acquisition.