Factors influencing helicopter approach to an LZ in adverse weather include which of the following?

• A. Hair length
• B. Visibility, wind, rotor wash, and obstacle clearance
• C. Fuel type
• D. Noise level

Answer: (B)

When approaching a landing zone in adverse weather, you must account for how weather and rotorcraft effects limit sight, control, and hazard avoidance. Visibility determines whether you can actually see the LZ and any obstacles around it, so limited sight forces more conservative planning or alternative landing options. Wind matters because it shapes your approach path, speed, and the need to compensate for gusts or crosswinds; poor wind conditions can push the helicopter off the intended line or make a precise touchdown difficult. Rotor wash, or downwash, can kick up dust, debris, or water and create turbulence near the ground, which reduces visibility and makes low-altitude control more challenging during the final phases of the approach. Obstacle clearance is crucial because reduced visibility together with gusty winds and rotor wash increases the risk of striking trees, poles, wires, or other hazards near the LZ, so you must maintain safer margins and follow a clear, obstacle-aware approach path.

Hair length, fuel type, and noise level don’t influence the immediate safety factors of an approach in adverse weather, so they aren’t considerations in this scenario.