Which distance is the correct bystander distance for an LZ?

• A. 50 feet
• B. 75 feet
• C. 100 feet
• D. 150 feet

Answer: (C)

A safe bystander distance is about giving a large buffer from the helicopter’s rotor wash and any debris the downdraft can kick up. That clearance protects people from being struck by debris and from the powerful air blast, and it gives the pilot a clear view and the ground crew room to guide and communicate without people entering the rotor arc. If bystanders are too close, they risk injury from dust, grit, or small projectiles and from the unpredictable air flow around the rotor. If they’re much farther away, it’s safer but can hinder coordination and access for loading or unloading. So, the standard approach is to establish a broad, safe perimeter around the LZ to keep everyone out of the rotor-wash and debris zones while still allowing efficient operation.