What size helicopter landing point is required for observation helicopters, and what is the diameter?

• A. Size 1, 25 meters
• B. Size 2, 30 meters
• C. Size 3, 40 meters
• D. Size 4, 80 meters

Answer: (A)

Landing zone size is chosen based on the rotor footprint and the clearance needed for safe approach, landing, and departure. For observation helicopters, you want the smallest practical area that still provides full rotor clearance and a clear path for landing and takeoff. The smallest designation, Size 1, corresponds to a 25-meter diameter HLZ. This size gives enough room for the rotor wash and the helicopter’s footprint without wasting space that would be needed for larger aircraft during cargo or full-load operations. Larger designations exist—Size 2 is 30 meters, Size 3 is 40 meters, and Size 4 is 80 meters—reserved for bigger helicopters or missions that demand more margin. So, the correct choice is the smallest option: Size 1, 25 meters.