drift lead

drift lead

[′drift ‚led]
(navigation)
A lead placed on the bottom to indicate movement of a vessel; at anchor the lead line is usually secured to the rail with a little slack and if the ship drags anchor, the line tends forward; also used to indicate when a vessel coming to anchor is dead in the water or when it is moving astern, or to indicate current if a ship is dead in the water.
References in periodicals archive ?
A museum spokesman said: "The Drift leads visitors through a narrative that reveals the processes of mining today - and the sheer physicality of the work.