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9 lis 2016 · Lowest usable flight level chart. Lowest usable flight level chart. November 9, 2016 By Sarah Fritts.
Definitions. Transition Altitude. The altitude at or below which the vertical position of an aircraft is controlled by reference to altitudes. Transition Level. The lowest flight level available for use above the transition altitude. Transition Layer. The airspace between the transition altitude and the transition level.
The aircraft altimeter barometric sub-scale must be set to the appropriate setting for the phase of flight. These are: Flight level. Standard pressure setting (1013 hPa) is set when flying by reference to flight levels at or above the transition level; Altitude.
7 kwi 2010 · When issuing clearance to descend below the lowest usable flight level, advise the pilot of the altimeter setting of the weather reporting station nearest the point the aircraft will descend below that flight level.
The transition level is the lower limit to use the standard 1013hPa altimeter setting, applicable to all aircraft defined inside the associated TMA (terminal area) where transition altitude is published. The transition level is also: Sometimes published on charts (IAC, ARR, DEP) but not often.
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.
EXAMPLE: The minimum safe altitude of a route is 19,000' MSL and the altimeter setting is reported between 29.92 and 29.42 inches of mercury, the lowest usable flight level will be 195, which is the flight level equivalent of 19,500 feet MSL (minimum altitude plus 500 feet)
