Filling Density
- The ratio of the weight of liquid in a tank to the
weight of distilled water at 60° F. the tank will hold.
It is expressed as a percent.
Flag State
- Any state that allows ships to be registered under
its laws.
Flags of Necessity
(or Convenience) -
Flag states that provide lesser economic, financial,
tax and/or regulatory burdens to ship owners registering
their ships in those countries.
Flame Screen
(or Arrester) - A
device comprised of a fine wire gauze that is fitted
into the discharge end of a vent line. It prevents the
passage of flame, but will allow vapor to pass through.
Flame screens are also fitted to removable ullage plugs
used to cover ullage holes on cargo tank tops.
Force Majeure
- Clause permitting contract to be broken in the event
of uncontrollable events, e.g. war, strike, government
action, which preclude its fulfillment.
Fore, Foreward
- Toward the stem or the bow. The section of the vessel
between the stem and amidships.
Forepeak
- The narrow extremity of the vessel's bow. Also the
tank located in that part of the ship.
Frames
- The ribs of a ship.
Free on Board
(FOB) - The charterer
is responsible for the cost of loading the cargo.
Freeboard
- The distance from the water line to the top of the
weather deck on the side.
Freight Rate
- The charge made for the transportation of freight.
Fuel Oil
- A name given to the heaviest grades of residual fuel
used in marine oil burning boilers.
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