drift meter

[′drift ‚mēd·ər] (navigation) An instrument for measuring drift angle. Also known as drift indicator; drift sight.

drift indicator

Drigt-indicator.An instrument that looks vertically at the surface to provide an indication of drift angle. It consists essentially of a sight tube with a hairline that is rotated until objects on the ground travel parallel to it. This direction is compared with the course to get the drift angle. Also called a drift meter or drift sight meter.

单词	drift meter
释义	drift meter drift meter [′drift ‚mēd·ər] (navigation) An instrument for measuring drift angle. Also known as drift indicator; drift sight. drift indicator Drigt-indicator.An instrument that looks vertically at the surface to provide an indication of drift angle. It consists essentially of a sight tube with a hairline that is rotated until objects on the ground travel parallel to it. This direction is compared with the course to get the drift angle. Also called a drift meter or drift sight meter.
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