inner marker

短语

[计] 内部标记

词形变化

inner markers 复数 inner markers

别名

IM

释义与例句

n.
  1. 1.

    A type of marker beacon placed to indicate when an aircraft crosses the runway threshold of a Category II or Category III ILS or IGS approach, triggering a continuous visual and aural sequence of rapid-fire Morse code dots from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

    航空 商务 工程