How Do You Spell BACKSTAFF?

1. A backstaff refers to a navigational instrument historically used in the seafaring industry to measure the altitude of celestial bodies, particularly the sun. It consists of a long, slender wooden staff, often marked with divisions, and a hinged "vane" or "arc" that can be adjusted to various angles. The backstaff was predominantly used during the 17th century as an alternative to the more cumbersome cross-staff.

   The process of using a backstaff involved aligning the vane and observing the reflection of the celestial body from a mirror, with the user's back turned towards the sun. By adjusting the angle of the arc, an experienced navigator could manipulate the instrument until the direct and reflected image of the sun overlapped, allowing them to determine the altitude. This measurement was pivotal in calculating latitude and determining a ship's position at sea.

   Despite its depreciation with the advent of more sophisticated instruments, the backstaff played a crucial role in maritime exploration and navigation during its time. Its unparalleled ability to measure the sun's altitude in a relatively portable manner allowed sailors to determine their location on vast oceans, enabling the discovery of new lands and routes.

   Today, the backstaff is mostly regarded as a historical artifact, preserved in collections and museums, serving as a testament to the ingenuity and resourcefulness of early navigators who relied on such instruments to navigate the high seas.

2. An instrument for taking altitudes.

   Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.

Common Misspellings for BACKSTAFF

The word "backstaff" originally derives from the combination of two words: "back" and "staff".

"Back" dates back to Old English, where it was known as "bæc". It refers to the rear part of something or the opposite side of a front or main part. In the case of a tool, "back" refers to the side opposite the working or primary side.

"Staff" comes from Old English "stæf", which referred to a long, straight stick or rod. Over time, "staff" evolved to encompass various other meanings, including a walking stick, a pole used for support, or a rod employed for measurement.

The term "backstaff" specifically refers to a navigational instrument used in early astronomy and seamanship. It was developed around the mid-16th century and was used to measure the angle between the sun and the horizon.