| 释义 |
instrument meteorological conditions
instrument meteorological conditionsMeteorological conditions expressed in terms of visibility, distance from cloud, and ceiling; less than minimums specified for visual meteorological conditions. Also called IMC. See also visual meteorological conditions.instrument meteorological conditions
instrument meteorological conditions (IMC)Meteorological conditions expressed in terms of visibility, the distance from clouds, and the ceiling, less than the minimums specified for visual meteorological conditions. In a control zone, a VFR (visual flight rules) flight may proceed under instrument meteorological conditions if and as authorized by air traffic control.AcronymsSeeIMC |