H scope

H scope

[′āch ‚skōp]
(navigation)
A modified form of B scope on which the signal appears as two dots, the slope of the line joining them indicating elevation angle; the horizontal coordinate indicates bearing angle and the vertical coordinate range, with respect to the left-hand dot. Also known as H indicator; H scan.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.