Part 4/9:
The inaccuracies became increasingly evident as the plane continued its journey. Despite being off-course, the cockpit instruments portrayed a misleadingly normal flight path. The aircraft was actually turning south, diverging further from its intended course toward Makassar.
Meanwhile, air traffic control (ATC) was not privy to the deviation either. A system intended to alert controllers when flights strayed more than 10 nautical miles had a crucial error: it was set to trigger only after a 20-mile deviation had occurred. Consequently, ATC did not register that Flight 782 was veering dangerously off course.