Emergency Medical Services (EMS) have taken great strides toward the development of city and statewide programs. However, once a person embarks on a plane or on a ship for any extended period of time, the EMS are at times meager and at other times not coordinated well with ground EMS. The American Heart Association has developed a protocol for basic and advanced cardiac life support to exist in all major air terminals, and especially within aircraft of all types. Particularly important are those aircrafts carrying large numbers of people for extended periods of time.