'Thwart-ship pieces forming the buttocks of a ship, extended across the stern-post, to which they are bolted, and give her after-part the figure most suitable to the service for which she is intended.
♦ Deck-transom. That on which all the lower deck planks are rabbeted. The first, second, third transoms, &c., are respectively below the preceding.
♦ Helm-post transom. That which is at the head of the stern-post, and forms the upper part of the gun-room ports.
♦ Wing-transom. The next below, and forming the lower part.