In the event of GPS outages, which source provides the attitude and heading information used for navigation on the Boeing 787?

Prepare for the Boeing 787 KSV Test. Utilize interactive flashcards and multiple-choice questions, each offering insightful hints and explanations. Gear up efficiently for your certification exam!

Multiple Choice

In the event of GPS outages, which source provides the attitude and heading information used for navigation on the Boeing 787?

Explanation:
When GPS is unavailable, the aircraft relies on inertial reference data from the IRS/ADIRU to supply attitude and heading for navigation. The IRS uses gyroscopes and accelerometers to determine orientation (pitch and roll) and, by integrating the yaw rate, provides the heading. This data is fused by the flight management/navigation system and remains available without GPS, with redundancy across multiple IRS/ADIRU units to maintain continuity. Visual navigation by the crew or ground-based radar updates do not provide the continuous, self-contained attitude/heading reference needed for the navigation system, and GPS-based receivers cannot supply this information when satellites are not visible.

When GPS is unavailable, the aircraft relies on inertial reference data from the IRS/ADIRU to supply attitude and heading for navigation. The IRS uses gyroscopes and accelerometers to determine orientation (pitch and roll) and, by integrating the yaw rate, provides the heading. This data is fused by the flight management/navigation system and remains available without GPS, with redundancy across multiple IRS/ADIRU units to maintain continuity. Visual navigation by the crew or ground-based radar updates do not provide the continuous, self-contained attitude/heading reference needed for the navigation system, and GPS-based receivers cannot supply this information when satellites are not visible.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy