2 occurrences in 2 dictionaries
Reference: Calkers
Easton
workmen skilled in stopping the seams of the deck or sides of vessels. The inhabitants of Gebel were employed in such work on Tyrian vessels (27/9/type/mstc'>Eze 27:9,27; marg., "strengtheners" or "stoppers of chinks").
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Morish
Those who stop up the seams between the boards of a ship, the modern way of doing which is generally by driving in oakum with a mallet and a calking-iron or blunt chisel. 27/9/type/mstc'>Eze 27:9,27.