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LOWEST USABLE FLIGHT LEVEL If a change in atmospheric pressure affects a usable flight level in your area of jurisdiction, use TBL 4−5−2 to determine the lowest usable flight level to clear aircraft at or above 18,000 feet MSL.
19 cze 2017 · Aircraft in the flight levels use standard altimeter setting of 29.92" and aircraft below the FLs use the local altimeter setting. Let's say there's a VFR aircraft flying along at 17,500 feet (totally legal) using a local altimeter setting of 29.42". He would be 17,500 feet above sea level.
LOWEST USABLE FLIGHT LEVEL If a change in atmospheric pressure affects a usable flight level in your area of jurisdiction, use TBL 4−5−2 to determine the lowest usable flight level to clear aircraft at or above 18,000 feet MSL.
If no transition altitude and transition level are defined (which is common for en-route flights outside the TMAs), the vertical position of aircraft shall be expressed in terms of: flight levels at or above the lowest usable flight level
9 paź 2018 · If a change in atmospheric pressure affects a usable flight level in your area of jurisdiction, use TBL 4-5-2 to determine the lowest usable flight level to clear aircraft at or above 18,000 feet MSL.
The lowest usable flight level that can be assigned, and the point at which aircraft descending out of the flight levels will change their altimeters back to QNH. Due to atmospheric pressure variations, the TL can vary from day to day and (maybe?) region to region.
9 lis 2016 · Lowest usable flight level chart. Lowest usable flight level chart. November 9, 2016 By Sarah Fritts.
