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	Eng ID	Term	Definition
	1201	cyclone	See DEPRESSION.
	1202	cylindrical buoy	See CAN BUOY.
	1203	cylindrical projection	See PROJECTION.
	1204	daily rate	See CHRONOMETER RATE.
	1205	daily retardation	The amount of time by which corresponding tidal PHASES grow later day by day (averages approximately 50 MINUTES).
	1206	dam	A barrier to check or confine anything in motion; particularly one constructed to hold back water and raise its level to form a RESERVOIR, o... more A barrier to check or confine anything in motion; particularly one constructed to hold back water and raise its level to form a RESERVOIR, or to prevent flooding.
	1207	damped wave(s)	See WAVE.
	1208	damping	The dissipation of energy with TIME or distance. The progressive reduction of AMPLITUDE of OSCILLATIONS, WAVES, etc.
	1209	dan buoy	A BUOY consisting of a ballasted FLOAT carrying a staff which supports a flag or LIGHT.
	1210	danger angle	The maximum (or minimum) angle between two points, as observed from a craft, indicating the limit of safe approach to an offlying danger.
	1211	danger area	An area designated by a proper authority, in which a danger to craft exists. Also called danger zone.
	1212	danger bearing	See BEARING.
	1213	danger buoy	See ISOLATED DANGER MARK.
	1214	danger line	A line drawn on a CHART, to indicate the limits of safe NAVIGATION for a vessel of specific DRAFT. A dotted line on a CHART to emphasize the... more A line drawn on a CHART, to indicate the limits of safe NAVIGATION for a vessel of specific DRAFT. A dotted line on a CHART to emphasize the presence of an OBSTRUCTION.
	1215	dangerous rock	A SUNKEN ROCK of a small area (PINNACLE), at such a DEPTH as to be considered dangerous to SURFACE NAVIGATION.
	1216	dangerous semicircle	Region of a TROPICAL CYCLONE, situated to the right of its PATH in the northern hemisphere and to the left of its PATH in the southern hemis... more Region of a TROPICAL CYCLONE, situated to the right of its PATH in the northern hemisphere and to the left of its PATH in the southern hemisphere, in which the SEAS are higher and the WINDS more violent and tend also to carry shipping forward on to the CYCLONE's PATH. The other half of the CYCLONE is termed the navigable semicircle.
	1217	dangerous wreck	A WRECK submerged at such a DEPTH as to be considered dangerous to SURFACE NAVIGATION.
	1218	danger sounding	See SOUNDING.
	1219	danger to navigation	Any feature or condition that might hinder, obstruct, endanger or otherwise constitute danger to safe navigation.
	1220	danger zone	See DANGER AREA.
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