Definition
The traditional hand lead of about 3 to 4 kilograms on a marked line, still valuable as an independent check and for sounding from a tender. Traditional marks lie at 2, 3, 5, 7, 10, 13, 15, 17 and 20 fathoms, intervening depths being deeps. A hollow in the base can be armed with tallow to bring up a sample of the bottom, giving the nature of the ground for anchoring or for a line of soundings fix.
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