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Brownout/whiteout occurs when rotor downwash entrains dust/snow, obscuring pilot visual references. Low, wide, non-glare perimeter lighting (chemlights, cones, angled vehicle lights) preserves depth cues without blooming NVGs. High-beam headlights and strobes pointed upward cause glare and NVG “bloom,” degrading contrast sensitivity and spatial orientation. Positioning vehicles downwind places them in the dust plume and increases FOD risk; vehicles should be set outside rotor arc with lights shielded or angled away. Flight crews should coordinate LZ setup via clear radio commands, request dust abatement (wetting if available), and brief go-around criteria. Maintaining dust discipline during approach and departure, with minimized ground personnel and secured loose objects, reduces disorientation risks. These visual management strategies are integral to safe night operations where degraded visibility and terrain cues can rapidly erode situational awareness, increasing CFIT risk if not properly controlled.