(b) The lowest usable flight level is determined by the atmospheric pressure in the area of operation as shown in the following table: 29.92 (or higher) — 180
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(2) At or above 18,000 feet MSL, to 29.92″ Hg.
(b) The lowest usable flight level is determined by the atmospheric pressure in the area of operation as shown in the following table:
29.92 (or higher) — 180