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Glossary - J

Jacobs Ladder A rope ladder, lowered from the deck so that seafarers can climb aboard.
J Valve A valve with a spring loaded mechanism that allows a reserve of air in the tank that can be actuated by pulling a lever secured to the valve. Not generally used today.
Jetsam Goods cast overboard in order to lighten a vessel which is in danger of being sunk, notwithstanding that afterwards it perishes.
Jetty A structure, usually made of concrete or wood that projects out from the shore so that boats can tie up.










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