For observation helicopters, what is the required landing point size and diameter?

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

Answer: (B)

Landing point size is determined by the helicopter’s size and rotor clearance needs. Smaller, observation-type helicopters have the smallest safe landing footprints, because their rotor diameter is smaller and the required margin around the rotor arc is less. A 25-meter diameter landing point provides enough space for the rotor to clear obstacles during approach, touchdown, and departure, while minimizing the area that must be kept clear.

The larger sizes would be appropriate only for bigger helicopters with larger rotor discs and greater clearance requirements, so they’re not needed for observation helicopters. That’s why the 25-meter diameter option is the correct and most appropriate choice.