UK CAA defines ETOPS as "Extended range Twin Operations" "CAP789". مؤرشف من الأصل(PDF) في 2015-09-23. اطلع عليه بتاريخ 2013-09-14., EASA defines it as "Extended Range Operation with Two-Engine Aeroplanes" and ICAO as "Extended-range Twin-engine Operational Performance Standards"
UK CAA defines ETOPS as "Extended range Twin Operations" "CAP789". مؤرشف من الأصل(PDF) في 2015-09-23. اطلع عليه بتاريخ 2013-09-14., EASA defines it as "Extended Range Operation with Two-Engine Aeroplanes" and ICAO as "Extended-range Twin-engine Operational Performance Standards"