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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.
The whole category of monitors took its name from the first of these, USS Monitor, designed in 1861 by John Ericsson. They were low-freeboard, steam-powered ironclad vessels, with one or two rotating armored turrets, rather than the traditional broadside of guns. The low freeboard meant that these ships were unsuitable for ocean-going duties ...
Trunk deck ships had a low net tonnage (an approximate measure of cargo space) in comparison to their deadweight tonnage capacity (weight of cargo). [10] Net tonnage is a computation of volume, and the method of measurement used at the Suez Canal to determine tolls was based on a measure of net tonnage which excluded the cargo spaces in the ...
In the 1860s and 1870s several nations built monitors that were used for coastal defense and took the name monitor as a type of ship. Those that were directly modelled on Monitor were low-freeboard, mastless, steam-powered vessels with one or two rotating, armoured turrets. The low freeboard meant that these ships were unsuitable for ocean ...
raft ship Another name for a disposable ship. rail meat A term used to describe the members of a sailboat crew that are using their body weight to control the angle of heel of the boat. rake To incline from the perpendicular; something so inclined is said to be raked or raking (e.g. a stem, stern, mast, funnel, etc.). ram 1.
On a nautical chart with depths indicated in fathoms, it appears as a broad area with many "14" notations. broadhorn An alternate term for a flatboat. broadside 1. One side of a vessel above the waterline. 2. All the guns on one side of a warship or mounted (in rotating turrets or barbettes) so as to be able to fire on the same side of a warship.
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 battle, and because the smaller hull area allowed thicker armour.
To low-freeboard oared vessels, the bulkier sailing ships, the cog and the carrack, were almost like floating fortresses, being difficult to board and even harder to capture. Galleys remained useful as warships throughout the entire Middle Ages because of their maneuverability.