A common use of the sextant is to sight the sun at noon to find one's latitude.
From the en.wikipedia.org
However, unlike the backstaff, the sextant allows direct observations of stars.
From the en.wikipedia.org
This is when the index mirror is not perpendicular to the frame of the sextant.
From the en.wikipedia.org
This permits the use of the sextant at night when a backstaff is difficult to use.
From the en.wikipedia.org
In 1730 the sextant was invented and navigators rapidly replaced their astrolabes.
From the en.wikipedia.org
His only method of fixing his position was to take sun sights with a sextant.
From the en.wikipedia.org
To test for this, first zero the index arm then observe a star through the sextant.
From the en.wikipedia.org
Imagine trying to deduce this with the naked eye, a sextant and little else.
From the economist.com
This is when the telescope or monocular is not parallel to the plane of the sextant.
From the en.wikipedia.org
More examples
A unit of angular distance equal to 60 degrees
A measuring instrument for measuring the angular distance between celestial objects; resembles an octant
A sextant is an instrument used to measure the angle between any two visible objects. Its primary use is to determine the angle between a celestial object and the horizon which is known as the altitude. ...
The Tehran Conference (codenamed Eureka) was the meeting of Joseph Stalin, Franklin D. Roosevelt and Winston Churchill between November 28 and December 1, 1943, most of which was held at the Soviet Embassy in Tehran, Iran. ...
Sextant is the eleventh album by Herbie Hancock, and the last album with his Mwandishi Band.
Sextants for astronomical observations were used primarily for measuring the positions of stars. They are little used today, having been replaced over time by transit telescopes, astrometry techniques, and satellites such as Hipparcos.
(SEXTANTS) Measures vertical angles; there are many kinds, including box, continuous arc, sounding, surveying, etc.
A configuration of six souls who work together over many lifetimes. The positions of a quadrate are love, knowledge, power, support (or compassion), eccentric, and integrator. The first and fourth positions are strongest.
One of the six relatively equal sections into which a dental arch can be divided, for example: tooth numbers 1-5; 6-11; 12-16; 17-21; 22-27; 28-32. Sometimes used for recording periodontal charting.