"Garmin’s emergency-only certification premise allowed Autoland to meet different reliability requirements from routine airline autoland systems."
Head reports Phil Straub's explanation that Garmin developed Autoland around emergencies where pilot incapacitation made the alternative outcome especially dangerous. That premise allowed certification to a lower reliability standard than Category III airline autoland systems intended for routine operation. It demonstrates how assumptions about a system's intended use shape the engineering and certification burden.
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