相关题目
（ ） is an area of defined dimensions within which the military training activities conducted, though not hazardous, are of interest to non-participating pilots.
（ ） is routine broadcast of meteorological information for aircraft in flight.
（ ） is a non-government air/ground radio communication facility which may provide air port advisory service at certain airports.
（ ） is the lowest flight level available for use above the transition altitude.
（ ） is the actual flight path of an aircraft over the surface of the earth.
（ ） is a landing made on a runway aligned within 30-degree of the final approach course following completion of an instrument approach.
（ ） is the first 3000ft of the runway beginning at the threshold. The area is used for determination of Touchdown Zone Elevation.
（ ） is the beginning of that portion of the runway usable for landing.
（ ） is a general term used to describe airspace in which approach control service or airport traffic control service is provided.
（ ） is the length of runway declared available and suitable for the ground run of an airplane taking off.
