Under FAR Part 77, an obstruction is considered when the object height exceeds which criteria?

Under FAR Part 77, an obstruction is considered when the object height exceeds which criteria?

• A. when the object is higher than 499 ft AGL or 200 ft above EAE
• B. when the object is higher than 600 ft AGL or 300 ft above EAE
• C. when the object is higher than 450 ft AGL or 200 ft above EAE
• D. when the object is higher than 500 ft AGL or 100 ft above EAE

Answer: (A)

Under FAR Part 77, the height thresholds determine when an object is considered an obstruction to navigable airspace. The rule uses two reference points: height above the ground (AGL) and height above the established airport elevation (EAE). If an object exceeds 499 ft AGL, it is treated as an obstruction. If it is more than 200 ft above the established airport elevation, it is also treated as an obstruction. This dual criterion ensures that tall structures near airports and objects on higher terrain are evaluated for potential impacts on flight paths and instrument procedures. So the standard you need to know is: more than 499 ft AGL or more than 200 ft above EAE. The other options use different thresholds and don’t match the FAR Part 77 criteria.

Under FAR Part 77, the height thresholds determine when an object is considered an obstruction to navigable airspace. The rule uses two reference points: height above the ground (AGL) and height above the established airport elevation (EAE). If an object exceeds 499 ft AGL, it is treated as an obstruction. If it is more than 200 ft above the established airport elevation, it is also treated as an obstruction. This dual criterion ensures that tall structures near airports and objects on higher terrain are evaluated for potential impacts on flight paths and instrument procedures.

So the standard you need to know is: more than 499 ft AGL or more than 200 ft above EAE. The other options use different thresholds and don’t match the FAR Part 77 criteria.