FAA Jeppesen Instrument Rating Practice Test

Question: 1 / 400

What are the standard minimum altitudes for flights in mountainous terrain?

1,500 ft above the highest obstacle within 5 miles

1,000 ft above the highest obstacle within 4 nautical miles

2,000 ft above the highest obstacle within 4 nautical miles

The correct answer reflects the standard minimum altitudes for aircraft flying in mountainous terrain, which emphasizes safety by providing adequate vertical clearance from obstacles. The requirement of flying at 2,000 feet above the highest obstacle within 4 nautical miles ensures that pilots maintain a significant margin from potential hazards such as mountains or tall structures, especially in areas where terrain can change rapidly.

This altitude standard is established to reduce the risk of conflict with obstacles during flight, allowing for safe maneuvering and ensuring that pilots have sufficient reaction time in case of unexpected situations. By adhering to this rule, flights can navigate mountainous regions with increased safety, which is critical given the unpredictable nature of such environments.

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500 ft above the highest obstacle within 3 nautical miles

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