Line tub

(Naut.) a tub in which the line carried by a whaleboat is coiled.

See also: Line

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
The sailors at the fore and mizzen had come down; the line tubs were fixed in their places; the cranes were thrust out; the mainyard was backed, and the three boats swung over the sea like three samphire baskets over high cliffs.