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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 o... 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 METEORO... 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 of... 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 r... 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.