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The United States Navy Bureau of Ships contracted on several occasions for orders of hand-held stadimeters starting shortly after its development in the late 1890s. By the early 1900s it along with the sextant, spyglass, maneuvering board , parallel motion protractor and other navigation tools were part of the standard gear for the navigation ...
Thomas S. Negus (May 1, 1828 – March 17, 1894) was a 19th-century American businessman. He was well known for the manufacture and sale of maritime chronometers and nautical instruments in New York City under the name T.S. & J.D. Negus Company.
From that time onward, the sextant was the instrument that experienced significant development and improvements and was the instrument of choice for naval navigators. The octant continued to be produced well into the 19th century, though it was generally a less accurate and less expensive instrument.
The frame of a sextant is in the shape of a sector which is approximately 1 ⁄ 6 of a circle (60°), [2] hence its name (sextāns, sextantis is the Latin word for "one sixth"). "). Both smaller and larger instruments are (or were) in use: the octant, quintant (or pentant) and the (doubly reflecting) quadrant [3] span sectors of approximately 1 ⁄ 8 of a circle (45°), 1 ⁄ 5 of a circle (72 ...
U.S. Navy ribbons, pin insignias, and badge worn on the uniform of a Command Master Chief.. Insignias and badges of the United States Navy are military badges issued by the United States Department of the Navy to naval service members who achieve certain qualifications and accomplishments while serving on both active and reserve duty in the United States Navy.
USS George Washington Carrier Strike Group underway in the Atlantic USS Constitution under sail for the first time in 116 years on 21 July 1997 The United States Navy has approximately 470 ships in both active service and the reserve fleet; of these approximately 50 ships are proposed or scheduled for retirement by 2028, while approximately 110 new ships are in either the planning and ordering ...
Spencer, Browning & Rust quintant sextant or lattice sextant at the United States Geological Survey Museum. One of the oldest items in the collection of the United States Geological Survey Museum is a quintant sextant or lattice sextant (pictured) that was manufactured by Spencer, Browning & Rust. The sextant dates from the 1820s to 1850s. [9]
In 1759 John Bird, commissioned by the Board of Longitude, produced an instrument taking up both suggestions, a sextant of 20 inches radius with a brass frame [4] and 1/3 the weight of the 16-inch-diameter (410 mm) reflecting circle, [4] which served as a prototype of the marine sextant still used today.
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