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The backstaff, an early navigation instrument, was primarily used by sailors and navigators during the Age of Discovery in the 16th and 17th centuries. It allowed them to measure the altitude of the sun to determine latitude while avoiding direct sunlight, which could damage the eyes. The backstaff was an improvement over the astrolabe and was particularly popular among English mariners. It was eventually replaced by more advanced instruments like the sextant.
What else can I help you with?
Is an instrument used to measure the position of stars.?
An Astrolabe. See the website www.astrolabe.org,or Wikipedia, or use Google books for a public domain encyclopedia. I own an old encyclopedia britannica, the 1903 edition and love it for answering questions such as this, or those related to woodworking, carpentry, masonry, or industrial machinery; e.g. what does an automatic pattern knitting machine or a jacquard loom look like?.historically several instruments were used to measure this angle, they include the quadrant, cross staff, the backstaff and the mariner's astrolabe.
What is the use of acetal?
dilute ethanoic acid is used as a preservative in the preparation of pickles.it is used for making cellulose acetate which is an important artificial fibre.it is used in the manufacture of acetone and esters used in perfumes.it is used in the preparation of dyes.it is used to coaggulate rubber from latex.it is used for making white lead which is used as a white paint.it is used as a chemical reagent in chemistry lab.
How is visible light used in photography?
In much the same way as sound is used in music, food is used in cooking, and soil is used in agriculture.
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What is a backstaff?
A backstaff is a an early navigational instrument for measuring the altitude of the sun and hence calculating latitude.
How does a backstaff work?
A backstaff is a navigational instrument used to measure the altitude of the sun. It consists of a graduated arc and two vanes, one of which is moved to block the sun's image as it is reflected onto a mirror. By aligning the shadow of the vane with the horizon, sailors can determine the sun's altitude and calculate their latitude.
How do you determine longitude and latitude with a chronometer and backstaff?
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Who invented the back staff?
"Captain John Davis invented a version of the backstaff in 1594"
Is the backstaff still used today?
The backstaff is largely obsolete in modern navigation, having been replaced by more accurate instruments like the sextant and advanced electronic systems such as GPS. However, it may still be used in specific educational contexts or by enthusiasts of traditional navigation methods. While it played a significant role in maritime navigation during the 17th and 18th centuries, its practical application today is minimal.
What did john Davis invent?
John Davis invented the backstaff and the double quadrant. He is more famous for the double quadrant, which people actually called the Davis quadrant. However, he is more famously known for being an English explorer.
Is an instrument used to measure the position of stars.?
An Astrolabe. See the website www.astrolabe.org,or Wikipedia, or use Google books for a public domain encyclopedia. I own an old encyclopedia britannica, the 1903 edition and love it for answering questions such as this, or those related to woodworking, carpentry, masonry, or industrial machinery; e.g. what does an automatic pattern knitting machine or a jacquard loom look like?.historically several instruments were used to measure this angle, they include the quadrant, cross staff, the backstaff and the mariner's astrolabe.
What tools did Pedro Cabral use?
Pedro Álvares Cabral, the Portuguese explorer, used navigation tools such as charts, compasses, astrolabes, and quadrant instruments to navigate the seas during his voyages. He also relied on traditional celestial navigation methods using the stars to determine his position at sea.
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What were Aboriginal tools mostly used for?
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