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In sailing and boating, a vessel's freeboard is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. [1] In commercial vessels, the latter criterion measured relative to the ship's load line, regardless of deck arrangements, is the mandated and regulated meaning. [2]
Freeboard is also reduced for ships that have large openings in the hull and open cargo spaces such as Roll-on/roll-off car carriers. [ 6 ] According to the Annexes to the convention, also taken into account are the potential hazards present in different zones and different seasons and additional safety measures concerning doors, hatchways, etc.
These were low-freeboard vessels intended for local, coastal defense. They were badly overweight when completed, and as a result suffered from serious problems, including belt armor that was fully submerged when the ships were fully loaded, a tendency to ship excessive amounts of water, and poor handling characteristics.
The design followed White's standard pattern for smaller steel cruisers, being of protected type (with an internal curved steel armour deck protecting the machinery spaces) and featuring low freeboard amidships with raised bulwarks connecting the forecastle and poop for weatherliness.
All were similar in size and capabilities, typically with a speed of around 25 knots (46 km/h; 29 mph), three 457 mm (18.0 in) torpedo tubes, two 75 mm (3.0 in) guns, and four 57 mm (2.2 in) guns, and in a departure from the high-freeboard hullform of earlier torpedo cruisers, they were low-freeboard ships with a high forecastle: this style of ...
This was one of the changes which led to the vessels being 600 tons overweight, causing an increase in draught of a foot. The Trafalgars were the penultimate low-freeboard battleships built for the Royal Navy. This design had been favoured for several years because it reduced the size of the target that the ships presented to enemy guns in ...
USS Monitor had had very little freeboard so as to bring the mass of the gun turret down, thereby increasing stability and making the boat a smaller and therefore harder target for gunfire. At the end of the American Civil War, the U.S. Navy Casco-class monitors had large ballast tanks that allowed the vessels to partially submerge during ...
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