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Eng ID Term Definition
401
base map
See MAP.
402
base net
See BASE EXTENSION TRIANGULATION.
403
basepoint
A basepoint is any point on a baseline.
404
base tape (or wire)
A tape or wire of metal or alloy, so designed and graduated that it is suitable for measuring the lengths of BASES. See also TAPE: INVAR, TA... more
A tape or wire of metal or alloy, so designed and graduated that it is suitable for measuring the lengths of BASES. See also TAPE: INVAR, TAPE: STEEL and WIRE: INVAR.
405
base terminals
The two extremes of a BASE LINE. Usually marked on a MONUMENT or metal stake buried beneath a visible SURFACE MARK. See also REFERENCE MARK.
406
base tilt
See TILT.
407
basic control
See CONTROL.
408
basic survey
A hydrographic survey so complete and thorough that it does not need to be supplemented by other surveys, and is adequate to supersede, for ... more
A hydrographic survey so complete and thorough that it does not need to be supplemented by other surveys, and is adequate to supersede, for charting purposes, all prior hydrographic surveys of the area.
409
basin
A DEPRESSION of the SEAFLOOR more or less equidimensional in plan and of variable extent.
410
basin: tidal
A BASIN affected by tidal forces in which water can be kept at a desired LEVEL by means of a gate.
411
bathymeter
An instrument primarily designed for measuring DEPTH of water.
412
bathymetric
(adj.). Of or pertaining to BATHYMETRY.
413
bathymetric chart
See CHART.
414
bathymetric map
A topographic map of the ocean floor, or the bed of a lake. A topographic chart of the bed of a body of water, or a part of it. Generally, b... more
A topographic map of the ocean floor, or the bed of a lake. A topographic chart of the bed of a body of water, or a part of it. Generally, bathymetric maps show depths by contour lines and gradient tints.
415
bathymetry
The determination of ocean depths. The general configuration of SEAFLOOR as determined by profile analysis of depth data.
416
bathyscaphe (or bathyscaph)
A free, manned vehicle for exploring the deep OCEAN.
417
bathysphere
A diving sphere for deep-sea observations.
418
bathythermogram
The record of temperature versus DEPTH made by a BATHYTHERMOGRAPH. Rarely used.
419
bathythermograph
A device for obtaining a record of temperature against DEPTH in the OCEAN, from a ship underway.
420
bay
A wide INDENTATION in the COASTLINE generally smal­ler than a GULF and larger than a COVE. For the purposes of the United Nations Conventio... more
A wide INDENTATION in the COASTLINE generally smal­ler than a GULF and larger than a COVE. For the purposes of the United Nations Convention on the Law of the Sea, a bay is a well-marked indentation whose penetration is in such proportion to the width of its mouth as to contain land locked waters and constitute more than a mere curvature of the coast. See also HISTORIC BAY.