St. John's Life Line has provided safe, rapid, air transport for emergency patients since 1984.

A flight crew, comprising a registered nurse, a paramedic and a pilot respond to life-threatening emergencies: trauma, medical, or obstetrical. Response is either to a scene, where a ground unit assists the crew, or a to hospital to transfer a critically ill patient.

Life Line is accredited by the Commission on Accreditation of Medical Transport Systems.

All flights are conducted by, and operational control over all aircraft is exercised solely by Metro Aviation, Inc.