Shipping terminologies for your guidance

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1. A sailor. Also jack tar or just tar.

2. A flag. Typically the flag was talked about as if it were a member of the crew. Strictly speaking


A wood or fibre cover placed around such containers as cans and bottles.

Jacklines or jack stays

Lines, often steel wire with a plastic jacket, from the bow to the stern on both port and starboard. The Jacklines are used to clip on the safety harness to secure the crew to the vessel, while giving them the freedom to walk on the deck.

Jacob's Ladder

A rope ladder suspended from the side of a vessel and used for boarding.


A large jib, strongly overlapping the mainmast. Also called genoa.


Debris ejected from a ship that sinks or washes ashore..


The act of throwing cargo or equipment (jetsam) overboard when a ship is in danger.

Jettison and washing overboard

Jettison and washing overboard


A mole or breakwater, running out into the sea to protect harbours or coasts. It is sometimes used as a landing-pier.


A triangular staysail at the front of a ship.


A spar used to extend the bowsprit.


For more information see gybe.


The fourth mast - although ships with four or more masts were uncommon - or the aft most mast where it is smallest on vessels of less than four masts.


A slender triangular recess cut into the faying surface of a frame or steamed timber to fit over the land of clinker planking, or cut into the faying edge of a plank or rebate to avoid feather ends on a streak of planking. The feather end is cut off to produce a nib. The joggle and nib in this case is made wide enough to allow a caulking iron to enter the seam.

Joint Rate

A rate applicable from a point on one transportation line to a point on another line, made by agreement and published in a single tariff by all transportation lines over which the rate applies.

Joint Venture

A form of business partnership involving joint management and the sharing of risks and profits between enterprises sometimes based in different countries.


A traditional Royal Navy nickname for the Royal Marines.

Jones Act

A 1920 Act of the U.S. Congress prohibiting foreign flag carriers from participating in the U.S. intercoastal trade by water.

It currently is applicable in such trade lanes as the US continental states to and from Hawaii and Alaska.


A voyage from one place, port or country to another one, in case of a round trip, to the same one.


Old cordage past its useful service life as lines aboard ship. The strands of old junk were teased apart in the process called picking oakum.


Juridical decisions used for explanation and meaning of law.


With this method of inventory control