When selecting a landing zone (LZ) for a helicopter during a night-time emergency medical evacuation, which critical factor must be ensured to maintain safety?
The landing zone is close to the patient’s location to minimize transport time.
The landing zone is made of concrete or asphalt to ensure stable ground.
The landing zone is well-lit with ground lights and flares.
The landing zone is clear of obstacles such as trees, wires, and poles.