Gangway (Gangplank)
- A device by which persons come on board or disembark
the vessel.
Gas Free
- An atmospheric condition in a tank when it is free
from any concentration of inflammable, noxious or toxic
gases and vapors.
Gas Free Certificate
- A certificate issued by a chemist after sampling the
air in a tanker's cargo tanks after the cargo has been
pumped out. It is endorsed with one of the following
notations: (1) Safe for men, (2) Not safe for fire,
(3) Safe for men and fire, (4) Not safe.
Gauging
- A process of measuring height of a liquid in a storage
tank usually using a weighted graduated steel tape and
bob.
General Arrangement
Plan - A drawing of
a ship which lists all necessary statistics and operating
information such as LOA, SDWT, cargo, water, fuel capacity,
etc. The deadweight scale is also contained on this
important chart which is usually posted outside the
ship's office or mate's cabin.
General Average
- A general contribution of money paid by all parties
concerned in a marine adventure in direct proportion
to their several interests when a voluntary or deliberate
sacrifice has been made of one or more of the party's
goods in time of peril with a view to saving the remainder
of the property.
Gross Tonnage
- The internal capacity of a vessel measured in units
of 100 cubic feet. Also known as Gross Registered Tonnage.
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