ClipArt ETC
"Ship's Floor. Nautical, that part of the bottom of a vessel on each side of the keelson which is most nearly horizontal. AA, floor-plates; BBB, keelsons; FF, main frame; K, keel; LL, lightening-holes; RR, reverse frame." -Whitney, 1911

Floor of Ship

"Ship's Floor. Nautical, that part of the bottom of a vessel on each side of the keelson which is most…