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A sextant is an instrument used to measure the angle between two visible objects. It is primarily used as a navigational instrument to determine the elevation of a celestial body above the horizon thereby allowing the observer to calculate a line of position (LOP) on the surface of the earth. With only one LOP, a navigator can be sure that his position is on that line somewhere, but he cannot know for sure where on that line he is. By combining additional LOPs (triangulation), navigators are able to determine their exact latitude and longitude.
What else can I help you with?
Do people use sextants today?
Sextants are still available, and are a practical low-tech backup for when a boat's GPS and other electronics stop functioning. So if you're a ship's captain, or even just a serious hobbyist, it's well worth it to take the time to learn how to operate one.
What are some items that made sailing easier?
Compasses, sextants, astrolabes, telescopes, and binoculars.
How do sailors use sextants?
Sailors use sextants to measure the angle between a celestial body, such as the sun or a star, and the horizon. By knowing the time of day and comparing this angle with the celestial body's known position in the sky, sailors can determine their latitude and longitude, assisting with navigation at sea.
What instrument measures angles in degrees?
A protractor is one such instrument. Navigational aides that do the same include compasses and sextants.
How did saliors charterd their ways across the seas?
They took star-sights with sextants and often made their own maps.
What are the instruments in navigation?
the instruments in navigation are gps's, kamals, sextants, cross staff, back staff, mariners astrolabe, quadrant, and octants :)
How can a explorer tell when he is at the north pole?
Nowadays it is easy because of GPS, but in the olden days they had to use real navigation techniques with sextants and magnetic variation charts.
What did Sir Robert Falcon Scott use to navigate?
Navigation technologies in the age of Heroic Exploration included sextants, theodolites and other celestial navigation tools.
What devices where responsible for helping sailors navigate the ocean?
There are quite a few devices that have made sea exploration as you know it possible. Submarines are one of these devices.
Which of the following is characteristic of the phylum Platyhelminthes?
they have soft bodies. they are mainly found in the seashore,beaches,and other banks of the river.they have a single foot through which they can walk.they have exhalent and inhalent sextants.
What are octants and sextants?
Octants and sextants are divisions of space used in geometry and navigation. An octant is one of the eight divisions of a three-dimensional space, typically defined by the signs of the coordinates (positive or negative) in a Cartesian coordinate system. A sextant, on the other hand, is a navigational instrument used to measure the angle between two visible objects, primarily for determining latitude and longitude at sea. The term "sextant" can also refer to a sixth of a circle, but in navigation, it’s crucial for celestial navigation.
Are quadrants still used if so what for?
Quadrants and sextants are still used but to a much lesser degree since the introduction of electronic instruments and satellite GPS systems were introduced. Quadrants/sextants are instruments used to measure angles in surveying and navigation. Using trigonometry when surveying, measuring an angle and knowing the length of a side and another angle of a triangle other distances and angles can be calculated. In navigation, measuring the angle of a star from the horizon and using a set of tables and an accurate time piece your position can be calculated.
