outer marker

短语

[电] 外记号

词形变化

outer markers 复数 outer markers

别名

OM

释义与例句

n.
  1. 1.

    A type of marker beacon placed to indicate the final approach fix of an ILS or IGS approach, triggering a continuous sequence of visual and aural Morse code dashes from the marker beacon receiver in the cockpit of an aircraft flying over the marker.

    航空 商务 工程