on the bow
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on the bow[′ȯnthə ′bau̇]
Bearing approximately 045° relative (on the starboard bow) or 315° relative (on the port bow); the expression is often used loosely for broad on the bow, or bearing exactly 045° or 315° relative.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.