keel-plate

Depth, underside of deck to keel-plate, 11 feet 2 inches.

Famous Sea Fights From Salamis to Tsu-Shima John Richard Hale

The _Monitor_ was launched at New York on January 30, 1862, the hundredth day after the laying of her keel-plate.

Captains of the Civil War; a chronicle of the blue and the gray William Charles Henry Wood 1905

There is no keel properly so called, but in its place a flat keel-plate of iron, about two feet wide and one inch thick, which runs the entire length from stem to stern.

Man on the Ocean A Book about Boats and Ships R. [Illustrator] Richardson 1859