on the quarter


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on the quarter

[′ȯnthə ′kwȯrd·ər]
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Bearing approximately 135° relative (on the starboard quarter) or 225° relative (on the port quarter); the expression is often used loosely for broad on the quarter, or bearing exactly 135° or 225° relative.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.