What is controlled airspace? After all, a lot of "controlled" airspace is actually not under direct control at all, right? Well let's start with the definition right out of the Aeronautical Information Manual (AIM): 3−2−1. General a. Controlled Airspace. A generic term that covers the different classification of airspace (Class A, Class B, Class C, Class D, and Class E … [Read more...] about What is Controlled Airspace? (AIM 3-2-1)
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Maximum Elevation Figure (MEF) – Sectional Chart
One of the most important numbers on a sectional is the Maximum Elevation Figure, or MEF. The MEF depicts the lowest altitude you can fly and still be assured to clear every obstacle within that quadrant. MEF's are calculated two ways, one for natural obstacles, and one for man-made obstacles. Each method ensures the highest level of safety and that as long as you stay … [Read more...] about Maximum Elevation Figure (MEF) – Sectional Chart