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The
following are some of the terms and definitions, which
may prove helpful in the daily dealings with oil tankers.
This list is compiled from various industry sources. While
extensive, it should not be considered a complete list
of all vessel and charter party related terms and definitions.
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Accommodation Ladder - A term applied to a portable
flight of steps suspended over the side of a vessel
from a gangway to a point near the water, providing
an easy means of access from a small boat. Accommodation
Ladders are usually supplied with two platforms, one
at each end. Sometimes called gangway ladder.
Adrift
- Floating at random; not fastened by any kind of mooring;
at the mercy of winds and currents; loose from normal
anchorage. A vessel is said to be adrift when she breaks
away from her moorings, warfs, and so on.
Aft, After
- Toward the stern or the back of the vessel. Between
the stern and the midship section of the vessel.
Afterbody
- The section of the vessel aft of amidships.
Aframax Carrier
- A tanker of approximately 80,000 to 120,000 dwt. See
also Vessel Sizes.
Agency
Fee - A fee charged to the ship by the ship's
agent, representing payment for services while the ship
was in port. Sometimes called attendance fee.
Air
Draft - The distance from the vessel's water
line to the upper most point on the vessel, usually
the top of a mast or radar tower. When a vessel has
to transit areas where there may be overhead obstructions
(bridges, power lines, cranes, loading arms, etc.) it
is vital to know what its air draft (draught) will be
at the time of transit. The air draft of a vessel will
vary depending upon the draft of the vessel and its
trim.
Aloft
- Above the deck.
Allowed Lay Time
- The number of hours allowed for loading and discharging
a cargo as stipulated in a Charter Party.
American
Bureau of Shipping (ABS) - A Classification Society.
Under the provisions of the U.S. Load-Line Acts - it
has the authority to assign load lines to vessels registered
in the U.S. and other countries.
Amidships
(or 'Midships') - The middle portion of a vessel.
API
- The American Petroleum Institute, founded in 1919,
was the first oil trade association to include all branches
of the petroleum industry.
API
Gravity (Relative Density) - A means used
by the petroleum industry to express the density of
petroleum liquids. API gravity is measured by a hydrometer
instrument having a scale graduated in degrees API.
The relation between API gravity and relative density
(formerly called specific gravity) is:
API Gravity at 60 Deg. F. = 141.5
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131.5
Relative
Density 60F/60F
Articles
of Agreement - The Document containing all
particulars relating to the terms of agreement between
the Master of the vessel and the crew. Sometimes
called ship's articles.
Atlantic
Basin - The Atlantic Ocean and the ports
and seas surrounding it, including the eastern seaboard
of the United States and Canada, the U.S. Gulf and Caribbean
Sea, the northern and eastern coasts of South America,
the North Sea, the Black Sea and the Mediterranean Sea.
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