prime vertical circle

prime vertical circle

[′prīm ′vərd·ə·kəl ′sər·kəl]
(geodesy)
The vertical circle through the east and west points of the horizon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

prime vertical circle

prime vertical circle
The prime vertical circle cuts the observer's vertical circle at 90° and forms the east and west point of the horizon.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved