Instrument for measuring ships speed and distance run.
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AMMETER
An instrument for measuring the magnitude of electric current flow.
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HYDROMETER
An instrument for determining either the specific gravity of a liquid or the API gravity.
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MOMENT OF INERTIA
The quantity obtained by multiplying the mass of each small part of a body by the square of its distance from an axis, and adding all the results.
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COLD CRANKING SIMULATOR
An intermediate shear rate viscometer that predicts the ability of an oil to permit a satisfactory cranking speed to be developed in a cold engine. (CCS)
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GREENWICH HOUR ANGLE
Angular distance west of the Greenwich celestial meridian; the arc of the celestial equator, or the angle at the celestial pole, between the upper branch of the Greenwich celestial meridian and the hour circle of a point on the celestial sphere, measured westward from the Greenwich celestial meridian throug
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HARPOON LOG
A log which consists of a rotator and distance registering device combined in a single unit, which is towed through the water. The TAFFRAIL LOG is similar except that the registering device is located at the taffrail, with only the rotator in the water.
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GROUND LOG
A device for determining the course and speed over the ground in shallow water consisting of a lead or weight attached to a line. The lead is thrown overboard and allowed to rest on the bottom. The course over ground is indicated by the direction the line tends and the speed by the amount of line paid out in a unit of time.
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HUNTING
Fluctuation about a mid-point due to instability, as oscillations of the needle of an instrument about the zero point.
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ANEMOMETER
An instrument for measuring the velocity of a fluid.
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SHEAR RATE
The difference between the velocities along the parallel faces of a fluid element divided by the distance between the faces.
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