marine alidade

marine alidade

[mə′rēn ′al·ə‚dād]
(navigation)
An instrument used aboard ship in conjunction with, but not including, a pair of binoculars to indicate the relative bearing of a target or object; it is usually fastened to a solid mounting with the zero degree position parallel to the centerline of the ship.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Full browser ?