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	Eng ID	Term	Definition
	4981	squall line	Fictitious moving line, sometimes of considerable extent, along which squall phenomena occur.
	4982	squares: method of	A method of transferring one SURVEY to another of different SCALE. Also called squaring down or squaring up depending on whether the SCALE i... more A method of transferring one SURVEY to another of different SCALE. Also called squaring down or squaring up depending on whether the SCALE is being decreased or increased.
	4983	squaring down	See SQUARES: METHOD OF.
	4984	squaring up	See SQUARES: METHOD OF.
	4985	squat	For a ship underway, the change of level of the bow and stern from the still water condition in response to the elevation and depression... more For a ship underway, the change of level of the bow and stern from the still water condition in response to the elevation and depression of the water level about the hull resulting from the bow and stern wave systems.
	4986	stability	Property of the state of rest or continuous movement of a system such that any disturbance introduced into this state decreases. In METEOR... more Property of the state of rest or continuous movement of a system such that any disturbance introduced into this state decreases. In METEOROLOGY, the term is often used as a synonym of STATIC STABILITY.
	4987	stability: static	State of hydrostatic equilibrium of the ATMOSPHERE in which a particle of air moved from its initial level undergoes a hydrostatic force whi... more State of hydrostatic equilibrium of the ATMOSPHERE in which a particle of air moved from its initial level undergoes a hydrostatic force which tends to restore it to this level. Also called hydrostatic stability.
	4988	stabilization: gyroscopic	See GYROSCOPIC STABILIZATION.
	4989	stabilizer: marine	A device installed on ships to reduce rolling.
	4990	stadia	A graduated rod used in the determination of distance by observing the intercept on the rod subtending a small known angle at the point ... more A graduated rod used in the determination of distance by observing the intercept on the rod subtending a small known angle at the point of observation. In practice the angle is usually defined by two fixed lines in the RETICLE of a TELESCOPE. Also called stadia rod.
	4991	stadia constant	The constant which is multiplied by the STADIA INTERVAL to obtain the length of a sight in METRES.
	4992	stadia interval	The length of rod subtended between the top and the bottom CROSS WIRES in the LEVELLING INSTRUMENT as seen projected against the face of the... more The length of rod subtended between the top and the bottom CROSS WIRES in the LEVELLING INSTRUMENT as seen projected against the face of the LEVELLING ROD.
	4993	stadia lines	Two or more horizontal wires fixed in the DIAPHRAGM at equal distances from the AXIS of TELESCOPES, of THEODOLITES and LEVELS. Also called s... more Two or more horizontal wires fixed in the DIAPHRAGM at equal distances from the AXIS of TELESCOPES, of THEODOLITES and LEVELS. Also called stadia wires.
	4994	stadia rod	See STADIA.
	4995	stadia wires	See STADIA LINES.
	4996	stadimeter	An instrument used to measure the distance from the observer to a more-or-less distant object, such as a vessel, when the HEIGHT of a specif... more An instrument used to measure the distance from the observer to a more-or-less distant object, such as a vessel, when the HEIGHT of a specified part of the latter (e.g. the mast) is known. It is in effect a hand-held RANGE FINDER.
	4997	stake	An elongated wood or metal pole embedded in the bottom to serve as a marker or support for fish nets.
	4998	stand	See STAND OF TIDE.
	4999	standard	An exact value (a physical entity or an abstract concept) established and defined by authority, custom, or common consent, to serve as a... more An exact value (a physical entity or an abstract concept) established and defined by authority, custom, or common consent, to serve as a reference, model, or rule in measuring quantities or qualities, establishing practices or procedures, or evaluating results. In chart construction, a master copy of a CHART upon which are marked all corrections affecting the CHART between printings (U.S. terminology).
	5000	standard atmosphere	See ATMOSPHERE.
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