Twenty four longitudinal zones, each of 15o and each representing one hour of time.
Related Terms |
LONGITUDINAL SEAM
A riveted or welded seam along the longitudinal axis of a boiler shell or drum.
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MIDSHIPS
The middle section of a vessel with reference to the longitudinal plane, as distinguished from fore or aft.
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SHEER
The longitudinal curve of a vessel's decks in a vertical plane. Due to sheer, a vessel's deck height above the baseline is higher at the stem and stern than at amidships
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BILGE KEEL
A long longitudinal fin fitted on the curved of a ship at the turn of the bilge to reduce rolling
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SWASH BULKHEAD
Longitudinal or transverse nonwatertight bulkheads fitted in a tank to decrease the swashing action of the liquid contents as a ship rolls and pitches at sea
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STRENGTH DECK
The deck that is designed as the uppermost part of the main hull longitudinal strength girder
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CROSS-BOX
A boxlike structure to the longitudinal drum of a sectional header boiler for connecting circulating tubes.
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NEWTONIAN TELESCOPE
A reflecting telescope in which a small plane mirror reflects the convergent beam from the speculum to an eyepiece at one side of the telescope. After the second reflection the rays travel approximately perpendicular to the longitudinal axis of the telescope.
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ROLL
Oscillation of a craft about its longitudinal axis. Also called ROLLING.
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TO ROLL
To oscillate or be oscillated about the longitudinal axis.
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