H-indicator

H-display

In radar, a B-display modified to include indications of the angle of elevation. The target appears as two closely spaced blips, which approximate a short bright line, the slope of which is in proportion to the sine of the angle of elevation. The left blip indicates the azimuth and the right blip the elevation. Also called an H-scan, H-scope, or H-indicator. See also B-display.