Those timbers that inclose the mortar-beds of bomb-vessels, and which are called carlings, because they are shifted occasionally. Short beams where a hatchway is cut.
·noun ·pl ·same·as <<Carl>>, 3. ...
Webster's Dictionary of the English Language
See carlines ...
The Sailor's Word-Book
Those large carlings which are placed at the sides of the masts from beam to beam, to frame the part...