This glossary is written for virtual airline and flight simulation use within Virtual Air Canada Airline. It is not intended as a real-world aviation reference.
ETOPS
Extended-range Twin-engine Operations Performance Standards
ETOPS is a regulatory certification and operational approval that permits twin-engine aircraft to fly routes that take them farther from a suitable diversion airport than would otherwise be allowed. Under the original 60-minute rule, a twin-engine aircraft had to remain within 60 minutes’ flying time (at single-engine cruise speed) of an adequate airport at all times. ETOPS approval - granted in ratings such as ETOPS-120, ETOPS-180, or ETOPS-240 - extends that threshold, enabling more direct transoceanic routes across the North Atlantic, Pacific, and polar regions. The rating indicates the maximum diversion time in minutes that the aircraft and operator are approved for.
ETOPS approval is granted jointly to the aircraft type and the airline’s operations. The aircraft must meet specific reliability standards for critical systems including engines, hydraulics, electrics, and pressurization. The operator must demonstrate maintenance practices, crew training, dispatch procedures, and route analysis capabilities that meet ETOPS requirements. Aircraft like the Boeing 787, Airbus A350, and Boeing 777 are certified for ETOPS-180 or longer, and some operations cross the Pacific using ETOPS-240 or even ETOPS-330 approvals. The term “ETOPS” is sometimes informally read as “Engines Turn Or Passengers Swim,” reflecting its stakes.