azimuth marker

azimuth marker

[′az·ə·məth ‚mär·kər]
(engineering)
A scale encircling the plan position indicator scope of a radar on which the azimuth of a target from the radar may be measured.
Any of the reference limits inserted electronically at 10 or 15° intervals which extend radially from the relative position of the radar on an off-center plan position indicator scope.