PLUG, certain pieces of timber, formed like the
frustum of a cone, and used to stop the haufe-holes,
and the breaches made in the body of a ship by can-
non-balls; the former of which are called haufe-plugs,
and the latter shot-plugs, which are formed of various
sizes in proportion to the holes made by the different
sizes of shot, which may penetrate the ship's sides or
bottom in battle; accordingly they are always ready
for this purpose.