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JACK to JIGGER
JACK
JACOBS STAFF
JAMMING
JEARS, or GEERS
JETTY-HEAD
JEWEL-BLOCKS
JIB
JIB-BOOM
JIBING
JIGGER
JIGGER TACKLE to JURY-MAST
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JIB-BOOM
JIB-BOOM, a boom run out from the extremity of the bowsprit, parallel to it's length, and serving to extend the bottom of the jib, and the stay of the fore-top-gallant-mast. This boom, which is nothing more than a continuation of the bowsprit forward, to which it may be considered as a top-mast, is usually attached to the bowsprit by means of two large boom-irons, (see the article IRON-WORK) or by one boom-iron, and a capon the outer-end of the bowsprit; or, similarly, by the cap without, and a strong lashing within, instead of a boom-iron; which is generally the method of securing it in small merchant-ships. It may therefore be drawn in upon the bowsprit as occasion requires, which is usually practised when the ship enters a harbour, where it might very soon be broke, or carried away, by the vessels which are moored therein, or passing by under sail.
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© Derived from Thomas Cadell's new corrected edition, London: 1780, page 161, 2003
Prepared by Paul Turnbull
http://southseas.nla.gov.au/refs/falc/0745.html