Fore-and-aft inclination from the vertical
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SPREAD
The divergence of the air stream in a horizontal or vertical plane after it leaves the outlet.
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ATHWARTSHIP
Across the ship, at right angles to the fore-and-aft centerline
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GYROSCOPIC DRIFT
The horizontal rotation of the spin axis of a gyroscope about the vertical axis
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HEAVE
The oscillatory vertical rise and fall, due to the entire hull being lifted by the force of the sea. Also called HEAVING
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HEIGHT OF TIDE
Vertical distance from the chart sounding datum to the water surface at any stage of the tide. It is positive if the water level is higher than the chart sounding datum. The vertical distance from the chart sounding datum to a high water datum is called RISE OF TIDE.
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HEELING ERROR INSTRUMENT
Heeling adjuster. Also called VERTICAL FORCE INSTRUMENT
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MODEL ATMOSPHERE
Any theoretical representation of the atmosphere, particularly of vertical temperature distribution.
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WICKING
The vertical absorption of a liquid into a porous material by capillary forces.
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INCLINATION
1. The angle which a line or surface makes with the verti- cal, horizontal, or with another line or surface. 2. One of the orbital elements (parameters) that specifies the orientation of an orbit. It is the angle between the orbital plane and a reference plane, the plane of the celestial equator for geocentric orbits and the ecliptic for heliocentric orbits.
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ICE FRONT
The vertical cliff forming the seaward face of an ice shelf or other floating glacier varying in height from 2 to 50 meters above sea level. See also ICE WALL.
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