Casualty evacuation, also known as CASEVAC or by the callsign Dustoff or colloquially Dust Off, is a military term for the emergency patient evacuation of casualties from a combat zone. Casevac can be done by both ground and air. `DUSTOFF` is the callsign specific to U.S. Army Air Ambulance units. DUSTOFF is an acronym meaning Dedicated Unhesita.....