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Eng ID Term Definition
1015
contour: depth
See DEPTH CURVE.
1193
curve: depth
See DEPTH CURVE.
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.
1789
fathom curve
See FATHOM LINE, DEPTH CURVE.
1790
fathom line
A DEPTH CURVE with DEPTH expressed in FATHOMS. Also called fathom curve, isobath.
2580
isobath
See DEPTH CURVE, FATHOM LINE.
3403
navigable area surveys (NAS)
Navigable Area Surveys are basic hydrographic surveys with restricted area coverage. The coverage is reduced by omitting require­ments for: ... more
Navigable Area Surveys are basic hydrographic surveys with restricted area coverage. The coverage is reduced by omitting require­ments for: 1. Development of the 0‑foot depth curve and foul, nearshore areas not considered navigable; 2. Complete field edit of the survey area. Naviga­ble Area Surveys may also be restricted to the main navigable channel or corridor.