What is the purpose of an LZ diagram in planning?

• A. Record flight times.
• B. Visualize approach routes, hazards, clearance, and security.
• C. Plot fuel consumption.
• D. Visualize aircraft maintenance schedules.

Answer: (B)

An LZ diagram in planning is used to create a clear, shared picture of how a helicopter will approach, land, and depart a designated landing zone. It visually maps out the landing area, showing the boundaries, terrain features, and potential hazards such as obstacles, trees, wires, and slopes, so everyone can see where the aircraft can safely operate. It also marks the intended approach and exit routes, wind considerations, and the security perimeter or control measures needed to protect the zone. This visual plan lets pilots and ground teams coordinate timing, signals, communications, and safety checks ahead of the mission, reducing risk by making any conflicts or hazards obvious and allowing adjustments before flight. Options like recording flight times, plotting fuel consumption, or scheduling maintenance serve different planning purposes and don’t fulfill the function of guiding how the landing will actually be executed.