first find out least count of main circular scale in degrees,then divide least count of main scale by total divisions on cylindrical scale(this cylindrical scale works as vernier scale for fist one,its least count will be in minutes) then further divide least count of cylindrical scale by total divisions of small vernier scale which touches it,(this small scale works as vernier scale for cylindrical scale and its least count will be in seconds).
Sextant.
A sextant is a tool used for ship navigation by measuring the angles between celestial objects, typically the stars, and the horizon. This information can then be used to calculate the ship's position on a nautical chart.
Historically, latitude was always measured with the sextant, and longitude with the chronograph (clock). Nowadays, it's all GPS. ------------------- The "sextant", from the latin word for "six", is one-sixth of a circle, and is the primary tool used in celestial navigation. However, before the sextant came into widespread use, the "quadrant" of a quarter-circle and the later "octant", an eighth of a circle, were used.
The navigational tool to find latitude is a sextant, which uses the angle of the sun or stars above the horizon to determine the observer's position on Earth. This angle corresponds to the observer's latitude.
A sextant is a device used to determine a ship's latitude by measuring the angle between the horizon and the celestial body, typically the sun or a star. This information is then used in conjunction with nautical charts to calculate the ship's position on the Earth's surface.
Astrolabe or Sextant
you can find sextant on history.com
you use a sextant to navigate.
Add all the speed readings you have, e.g. from every second over a minute. Then you divide the answer by the number of readings you have.
Yes.
Some disadvantages of using a sextant include the need for manual operation and calibration, the potential for human error in readings, and limitations in poor visibility conditions like fog or heavy cloud cover. Additionally, sextants require knowledge and skill in celestial navigation techniques, which can be complex and time-consuming to learn.
you draw a sextant by looking at googler in the images.
A sextant is an instrument used in navigation to measure the angle between a celestial body (like the sun or a star) and the horizon. By determining this angle, along with the time of the measurement, a navigator can use trigonometry to calculate their position on the Earth's surface.
the sextant helped me navagate my way to alaska
A sextant helps navigators determine their position by measuring the angle between a celestial object, such as the sun or a star, and the horizon. By comparing this angle with known values, sailors can calculate their latitude and longitude accurately. This tool is essential for celestial navigation when GPS or other electronic systems are not available.
how many years that the sextant become a symbol of navigation
1) to calculate coeficient of error 2) to calculate deviation between the readings to infere a behaviour