Jack staff | Article about jack staff by The Free Dictionary
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jack staff[′jak ‚staf]
A staff or flagpole attached to the bow of a ship, or the end of a spar projecting from the bow.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive
United States Lines' Patriot, for instance, flies a flag at the jack staff
(bow) when approaching a port to help show the captain the wind direction.
We should only refer to a Union Jack when talking about a flag hung from the jack staff
of a ship.