@mary,
"The Royal Flying Doctor Service of Australia (RFDS, informally known as The Flying Doctor) is one of the largest and most comprehensive aeromedical organisations in the world. It provides emergency and primary health care services for those living in rural, remote and regional areas of Australia. It is a not-for-profit organisation which provides health care to people who cannot access a hospital or general practice due to the vast distances of the Outback."
https://en.wikipedia.org/wiki/Royal_...e_of_Australia
https://www.flyingdoctor.org.au/