Acronyms that contain the term bolsters 

bolsters

Small cushions or bags of tarred canvas, used to preserve the stays from being chafed by the motion of the masts, when the ship pitches at sea. Pieces of soft wood covered with canvas, placed on the trestle-trees, for the eyes of the rigging to rest upon, and prevent a sharp nip. Also pieces of oak timber fayed to the curvature of the bow, under the hawse-holes, and down upon the upper cheek, to prevent the cable from rubbing against the cheeks.--Bolsters for sheets, tacks, &c., are small pieces of fir or oak, fayed under the gunwale, or other part, with the outer surface rounded to prevent chafing.--Bolsters, for the anchor lining. Solid pieces of oak bolted to the ship's side at the fore part of the fore-chains on which the stanchions are fixed that receive the anchor lining.

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