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A line marked at intervals of fathoms and weighted at one end, used to determine the depth of water. Also called lead line.
(Navigation) a line marked off to indicate its length and having a sounding lead at one end. It is dropped over the side of a vessel to determine the depth of the water
a line weighted with a lead or plummet and bearing marks to show the length paid out, used for sounding, as at sea.
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|Noun||1.||sounding line - (nautical) plumb line for determining depth|
plumb line, perpendicular - a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point
sounding lead - a metal bob at the end of a sounding line