Q1
In states without established minimum IFR altitudes, what is the minimum altitude an aircraft must maintain above the highest obstacle in high terrain or mountainous areas during IFR flight?
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Rules of Air
In states without established minimum IFR altitudes, what is the minimum altitude an aircraft must maintain above the highest obstacle in high terrain or mountainous areas during IFR flight?
What must aircraft intending to fly IFR in advisory airspace without using air traffic advisory services do?
What does the white dumbbell with a black perpendicular bar signify?