Z-marker beacon

Z-marker beacon

[′zē ′märk·ər ‚bē·kən]
(navigation)
Transmitter equipment installed as part of a four-course radio range; it radiates vertically to indicate to aircraft when they pass directly over the range station; it is usually not keyed for identification.

Z-marker beacon

Transmitter equipment installed as part of a four-course radio-range. It radiates vertically to indicate to aircraft when they pass directly over the range station; it is usually not keyed for identification. Range stations and Z-markers are obsolete.