English

Appearance

View mode
Number of cards in a row Here you can select the number of cards to be placed in a row for each of supported screen resolutions. Your current resolution is highlighted in this way.
	Large desktop
	Desktop
	Tablet
	Phone

Page size

Total record count: 6269.

Records per page

Use the “Quick Search” box to locate your required term and/or definition. The following “Search conditions” can be used to refine your search: “Contains”, “Begins with”, “Ends with”, “Equals”, “Does not contain” or “Does not equal.”

	Eng ID	Term	Definition
	1441	dock sill	The foundation at the bottom of the entrance to a dry dock or lock against which the caisson or gates close. The depth of water controlling ... more The foundation at the bottom of the entrance to a dry dock or lock against which the caisson or gates close. The depth of water controlling the use of the dock or lock is measured from the sill to the surface.
	1442	dog leg	A LEG which does not lead directly to the destination or way point.
	1443	doldrums	Zone of calm or light variable WINDS, in the lower atmospheric LAYERS, situated near the THERMAL EQUATOR; the zone follows, with slight time... more Zone of calm or light variable WINDS, in the lower atmospheric LAYERS, situated near the THERMAL EQUATOR; the zone follows, with slight time lag, the annual meridional fluctuation of the THERMAL EQUATOR.
	1444	dolphin	A post or group of posts, used for mooring or warping a vessel, or as an AID TO NAVIGATION. The dolphin may be in the water, on a WHARF or o... more A post or group of posts, used for mooring or warping a vessel, or as an AID TO NAVIGATION. The dolphin may be in the water, on a WHARF or on the BEACH.
	1445	dolphin beacon	A minor light structure consisting of a number of piles driven into the bottom in a geometric or random pattern and drawn together, with a l... more A minor light structure consisting of a number of piles driven into the bottom in a geometric or random pattern and drawn together, with a light mounted at the top.
	1446	Doppler effect	The apparent change in WAVE LENGTH, and therefore in FREQUENCY of RADIANT ENERGY, when the distance between the source and the observer or R... more The apparent change in WAVE LENGTH, and therefore in FREQUENCY of RADIANT ENERGY, when the distance between the source and the observer or RECEIVER is changing. This effect is exploited in underwater acoustics and satellite positioning.
	1447	Doppler navigation	See NAVIGATION.
	1448	double high water	See HIGH WATER.
	1449	double low water	See LOW WATER.
	1450	double meridian distance	See MERIDIAN DISTANCE.
	1451	double tide	See TIDE.
	1452	double zenith distance	See ZENITH DISTANCE.
	1453	doubtful sounding	See SOUNDING.
	1454	Dove prism	A prism which reverts the IMAGE but does not deviate nor displace the BEAM. A given angular ROTATION of the prism about its longitudinal AXI... more A prism which reverts the IMAGE but does not deviate nor displace the BEAM. A given angular ROTATION of the prism about its longitudinal AXIS causes the IMAGE to rotate through twice the angle. Also called a rotating prism.
	1455	down	An area of high, treeless GROUND, usually undulating and covered with grass. See also DUNE.
	1456	downstream	(adj. and adv.). In the direction of FLOW of a CURRENT or STREAM. The opposite is UPSTREAM.
	1457	downwind	(adj. and adv.). In the direction toward which the WIND is blowing. The opposite is UPWIND.
	1458	dracontic month	See MONTH: NODICAL.
	1459	draft (or draught)	The vertical distance, at any section of a vessel from the surface of the water to the bottom of the keel. When measured at or near the bow,... more The vertical distance, at any section of a vessel from the surface of the water to the bottom of the keel. When measured at or near the bow, it is referred to as draft forward and when measured at or near the stern as draft aft. The mean draft is the mean of the drafts forward and aft. These drafts are more specifically described as displacement drafts as opposed to navigational drafts which are measured to the lowest appendage to the hull as opposed to the keel.
	1460	draft aft	See DRAFT.
There are no records to display