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How does a backstaff work?

Updated: 9/18/2023
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Q: How does a backstaff work?
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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 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"


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.


How did African slaves get education?

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