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	Eng ID	Term	Definition
	1321	depth: standard	A DEPTH below the sea surface at which water properties should be measured and reported, according to the proposal by the International Asso... more A DEPTH below the sea surface at which water properties should be measured and reported, according to the proposal by the International Association of Physical Oceanography in 1936.
	1322	depth: thermometric	The DEPTH, in METRES, at which paired protected and unprotected THERMOMETERS attached to a NANSEN BOTTLE are reversed. The difference betwee... more The DEPTH, in METRES, at which paired protected and unprotected THERMOMETERS attached to a NANSEN BOTTLE are reversed. The difference between the corrected readings of the 2 THERMOMETERS represents the effect of the HYDROSTATIC PRESSURE at the DEPTH of reversal. This DEPTH may then be determined by formula or from a DEPTH ANOMALY GRAPH. DEPTHS obtained by this means are of greatest value when a WIRE ANGLE occurs.
	1323	depth anomaly graph	A graph constructed to determine the difference between the computed or THERMOMETRIC DEPTH and the ideal or assumed DEPTH of reversal of THE... more A graph constructed to determine the difference between the computed or THERMOMETRIC DEPTH and the ideal or assumed DEPTH of reversal of THERMOMETERS attached to a NANSEN BOTTLE.
	1324	depth contour	See DEPTH CURVE.
	1325	depth curve	A depth curve is a line connecting points of equal water depth which is sometimes significantly displaced outside of soundings, symbols, and... more A depth curve is a line connecting points of equal water depth which is sometimes significantly displaced outside of soundings, symbols, and other chart detail for clarity as well as generalization. Depth curves therefore often represent an approximate location of the line of equal depth as related to the surveyed line delineated on the source.
	1326	depth differences	Those differences in DEPTH which may be encountered in HYDROGRAPHIC SURVEYS at crossing of CROSS LINES and principal LINES OF SOUNDINGS.
	1327	depth finder	An instrument for the measurement of the DEPTH of water, particularly an ECHO SOUNDER.
	1328	depth gauge	See GAUGE.
	1329	depth ice	See ANCHOR ICE.
	1330	depth of the sea	The vertical distance from the water surface to the sea bottom.
	1331	derelict	Any property abandoned at SEA, often of sufficient size as to constitute a menace to NAVIGATION; especially an abandoned vessel. See WRECK.
	1332	derrick	A tall pyramid of latticed steel mounted over a borehole.
	1333	descending node	See NODE.
	1334	detached position	See POSITION.
	1335	detached sounding	See SOUNDING.
	1336	detail(s)	In CARTOGRAPHY, the items or particulars of information (shown on a MAP by lines, SYMBOLS, and lettering) which, when considered as a whole,... more In CARTOGRAPHY, the items or particulars of information (shown on a MAP by lines, SYMBOLS, and lettering) which, when considered as a whole, furnish the comprehensive representation of the physical and cultural features of the EARTH's surface.
	1337	detection threshold	The lowest or highest level of a parameter above or below which sensing equipment can detect the parameter.
	1338	detritus	In GEOLOGY, material removed by disintegration and other processes from the surface of ROCKS. There is a general tendence to use debris. In ... more In GEOLOGY, material removed by disintegration and other processes from the surface of ROCKS. There is a general tendence to use debris. In MARINE BIOLOGY, suspended matter of organic origin permanently incapable of reproduction organic detritus may often 'collect' a considerable amount of inorganic material.
	1339	deviation	See DEVIATION: MAGNETIC.
	1340	deviation: constant	DEVIATION which is the same on any HEADING, which may result from certain arrangements of asymmetrical horizontal SOFT IRON.
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