Jackstaff

is the staff at the bow of a ship.
Found on http://www.encyclo.co.uk/visitor-contributions.php

Jackstaff

A jackstaff is a small vertical spar (pole) in the bow of a ship, on which a particular type of flag, known as a jack, is flown. It is from this that the term Union Jack derives . == References== ...
Found on http://en.wikipedia.org/wiki/Jackstaff

jackstaff

short staff at ship's bow from which the jack is hoisted
Found on http://phrontistery.info/nautical.html

jackstaff

short staff at ship's bow from which the jack is hoisted
Found on http://phrontistery.info/j.html
No exact match found