Yet nearly one year ago, Malaysia Airlines Flight 370 vanished, taking the lives of 239 passengers and crew in one of aviation's greatest mysteries.
Live satellite tracking might have led searchers to the plane but it wasn't turned on for that trip. The flight was supposed to remain mostly over land, well within the coverage area of ground-based radar stations.
Airlines and regulators spent the past year debating how much flight tracking is necessary, balancing the economic costs against reassuring travelers another plane won't disappear. Now a plan is moving forward that would require airlines, by the end of 2016, to know their jets' positions every 15 minutes.
But it could make for quicker recovery of a missing aircraft and comfort the public. In an age when a missing iPhone or a FedEx package can be tracked, it's unfathomable that something the size of a Boeing 777 could never be found.
More From This Section
"The public's perception of what's acceptable has changed radically," said Todd Curtis, a former Boeing safety engineer and director of Airsafe.Com Foundation.
"The industry's perception of what's acceptable is not changing as quickly."
The industry thinks Flight 370 was an anomaly not likely to be repeated. If airlines, especially those in developing nations, are to spend money upgrading cockpits, they would rather add collision-avoidance systems that prevent fatalities.
"If you're too aggressive and stringent in setting up a requirement, countries will just elect not to participate," said John Hansman, an aeronautics professor at Massachusetts Institute of Technology.
The International Civil Aviation Organization, part of the United Nations, outlined the new tracking requirements last month. A formal vote on the rules is expected by November.