Conditions and circumstances for Lifeflight to be called is determined by the Public Safety organizations of the county. For landing site selection a helicopter requires a minimum area 60 by 60 feet, free of wires and obstructions directly overhead and not more than an eight degree slope. Avoid dusty areas. Hosing down an area helps. Site should be marked; usual markings are an emergency vehicle with flashing lights, smoke bomb, flares or car headlights criss-crossing each other at right angles.
When the helicopter is on its approach, stand in the center of the landing site waving a flashlight or flare until the pilot verifies that you are seen, then notify the pilot when the area is clear. Warn ground personnel to protect their eyes and patients from debris caused by rotor wash. Do NOT allow use of artificial lights while a helicopter is landing, as they will blind the pilot. Always maintain radio contact with the pilot and advise of problems or changes. Keep in mind that the rotor blades will continue to turn 1 to 3 minutes after landing. While medical crews may exit while the rotor is slowing down, don't approach or allow anyone else to approach while the blades are turning without the pilot's permission, then only from the front of the chopper. Maintain control of landing site until blades have completely stopped turning.
Just before the helicopter departs, clear the landing area of ALL personnel. Once it is clear, inform the pilot. Keep the area clear until the helicopter is gone. Remember things don't always go as planned. Keep in constant radio contact with the pilot!