Deadweight

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Deadweight

 

the gross weight of a ship’s cargo.

The deadweight, in causing a ship to settle to its summer load line in seawater, is an indicator of a freighter’s dimensions and its basic operational characteristic. Quantitatively, the deadweight is equal to the difference between the water displacement and the ship’s own weight, including its machinery and equipment ready for operation (along with pipelines filled with fuel, water in the boilers cooling the pipelines, etc.). The principal part of the deadweight of a freighter is the weight of the cargo; on a passenger ship the weight of the cargo (passengers and baggage) amounts to the lesser part of the deadweight, whereas its greater part is made up by the supplies expended by the ship (fuel and water).

References in periodicals archive ?
The NIST deadweight masses were determined in 1965 and 1966, following Tate's gravity measurements.
3] for the AISI 410 alloy, used for the three larger deadweight machines, and 7890 kg/[m.
The barometric pressure data from legal metrology evaluations using the NIST 498 kN deadweight machine have been extracted for a 5 year period beginning in 1998.
For the forces applied by the NIST deadweight machines, this calculation yields
The NIST Mass and Force Group maintains eight identical 8 1/2 digit computing multimeters for voltage-ratio measurements at six deadweight machines, ensuring that sufficient multimeters are available to accommodate load cells with multiple strain gauge bridge networks.
448 MN deadweight machine loading platens is shown in Fig.
a) The relative standard uncertainty in the determination of the mass of the deadweights, [u.
Accordingly, in 1965, a decision was made to adjust the mass of the weights of the deadweight machines to exert nominal pound forces; the standard pound force being defined as the force acting on a one-pound mass in a gravitational field for which the acceleration of free fall is 9.
For each of the larger machines, the value of g was estimated at the approximate center of gravity of the major components and at the center of gravity of the deadweight stacks.
The combined standard uncertainty in the force realized by deadweight application is computed as
448 MN deadweight machine, and a set of four 13 MN transfer standards each calibrated by comparison with three 4.
As mentioned previously, except for the 27 kN deadweight machine, all NIST deadweight machines have been instrumented for automated control.