: Usually indicate decimeters. Each numeral is 1 decimeter (10 cm) high, and the space between them is also 1 decimeter.
In nautical and maritime terms, refers to the vertical distance between a ship's waterline and the lowest point of its hull. Numerals are used as "draft marks" on the hull—typically at the bow, stern, and midships—to provide a visual indicator of how deep the vessel is sitting in the water . Understanding Draft Numerals numeral
Draft marks can be expressed in either (feet) or metric (decimeters or meters) units: : Usually indicate decimeters