A rounded wooden block with hole used to set up ship's stays
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HORIZON SYSTEM OF COORDINATES
A set of celestial coordinates based on the celestial horizon as the primary great circle; usually altitude and azimuth or azimuth angle.
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AUXILIARY CONTACTS
A set of contacts that perform a secondary function, usually in relation to the operation of a set of primary contacts.
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HOLE
1. A small depression of the sea floor. 2. An opening through a piece of sea ice, or an open space between ice cakes. 3. A small bay, particularly in New England
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FORESAIL
The lowest sail set on the foremast of square-rigged ship
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TIMKEN OK LOAD
The heaviest load that a test lubricant will sustain without scoring the test block in the Timken Test procedures, ASTM Methods D 2509 (greases) and D 2782 (oils).
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DISPLACEMENT PUMP
Pumps in which energy is added to the water periodically and the water is contained in a set volume.
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DEMAND CONTROL
A device which controls the kW demand level by shedding loads when the kW demand exceeds a predetermined set point.
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DRIFT
Term used to describe the difference between the set point and the actual operating or control point.
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SHEAVE
Pulley in the block
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BLOCKSHIP
A vessel sunk deliberately to block a waterway to prevent the waterwayʹs use by an enemy.
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