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The pit sword (also known as a rodmeter) is a blade of metal or plastic that extends into the water beneath the hull of a ship. [1] It is part of the pitometer log , a device for measuring the ship's speed through the water.
Typically, the pitometer has a long tube that penetrates the ship's hull near the keel. The part of the pitometer protruding from the ship is sometimes called a pit sword or rodmeter. This tube usually has two openings: one facing the direction of seawater motion that is used to measure the dynamic pressure of the seawater and one at 90° to ...
A naval vessel uses a device called a pit sword (rodmeter), which uses two sensors on a metal rod to measure the electromagnetic variance caused by the ship moving through water. This change is then converted to ship's speed.
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In June 1968 she underwent numerous minor fixes such as a boiler re-tubing and the pit sword at Port Chicago. In October 1968, the Mount Baker left for its final cruise to the Far East, carrying out its mission of underway (at-sea) transfers of ammunition to the 7th Fleet aircraft carriers, cruisers, destroyers and the one battleship New Jersey ...
A measuring rod is a tool used to physically measure lengths and survey areas of various sizes. Most measuring rods are round or square sectioned; however, they can also be flat boards. Some have markings at regular intervals. It is likely that the measuring rod was used before the line, chain or steel tapes used in modern measurement. [1]
A drawing from the Catalog of the Royal Armoury of Madrid by the medievalist Achille Jubinal in the 19th century. The original specimen was destroyed by a fire in 1884. The maquahuitl (Classical Nahuatl: māccuahuitl, other orthographic variants include mākkwawitl and mācquahuitl; plural māccuahuimeh), [4] a type of macana, was a common weapon used by the Aztec military forces and other ...