SEXTANT: A navigational instrument used to determine the vertical position of an object such as the sun, moon or stars. Used with celestial navigation.
sextant - A navigational instrument, used for measuring angles, as in celestial navigation when the altitudes of heaven bodies are taken when the known heights of objects ashore can be used to determine distance.
Sextant- An instrument that determines altitude of sun and stars.
Sheet- A line used to control the trim of a sail.
Shorten- To reef a sail, or drop a sail. To reduce sail area on a boat.
sextant, yoke
the celestial navigation tool used to measure the angle to the sun or planets. The process is a sextant shot.
shackle ...
Backstaff: (Sextant or backstaff)
(1) A navigation instrument used to measure the apparent height of a landmark whose actual height is known, such as the top of a lighthouse.
Position is determined by measuring the apparent altitude of one of these objects above the horizon using a sextant and recording the times of these sightings with an accurate clock.
The manner in which a sail is pulled up and fastened to its spars set a course To steer set up To tighten or make taut the last few inches of a halyard when raising the sail sextant An instrument used in navigation which determines ...
The sextant (named for 1/6 of a circle, or its 60° arc) was designed to determine a ship's position by measuring the angle of elevation between the horizon and a celestial body.
--Q-- QUADRANT A reflecting hand navigational instrument constructed on the same principle as the sextant but measuring angles up to 90 degrees only. Also known as an octant. One-fourth of the circumference of a circle.
horizon glass: on a sextant, the glass or lens through which the horizon is observed. The half of the glass nearer to the sextant frame is a mirror, the other half is clear.
They place a collapsible sailing rig and simple navigational equipment (a plastic sextant, a compass, a calibrated quartz watch and a nautical almanac) in the dinghy. The rig should include a mainsail that can be reefed for storms, and a sea-anchor.
Using a sextant, the degrees the star is above the horizon will roughly equally the ship's position in latitude.
 See also: Boat, Navigation, Hull, Sailing, Running
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