Celestial Navigation

To measure the distance between, for example, these two oil rigs in the figure, we will need a set of dividers. It is very important to note that we can…

The amplitude of a body is the angle at the observer's zenith or the arc of his rational horizon contained between the observer's prime vertical, and the vertical circle through…

Identify a heavenly body whose azimuth you want to take. Ensure that the altitude is not too high or too low (preferably between 20o and 60o Take the compass bearing…

In open seas, heavenly bodies are used to determine the compass error. Watch keepers must calculate compass error at least once every watch and after every major alteration of course.…

Azimuth circle -Azimuth circle is a non magnetic metal ring equipped with sighting devices for observing bearings of objects (celestial bodies, terrestrial bodies, targets, vessels, etc). It consists of a…

Description1) IntroductionIn earlier days when electronic navigation was not available, navigation in the open sea was solely done using sun and stars to plot the ship's position. Constellations were identified…

There are two types of errors on sextants: - Adjustable and Non- adjustable errors.a) Adjustable errorsError of perpendicularity: The index glass must beperpendicular to the plane of the instrument. It…

Description1) DefinitionThe sextant is a precision instrument used at sea for measuring altitudes of celestial bodies. It can also be used for measuring horizontal and vertical angles between and of…