Search results
Results from the WOW.Com Content Network
Navigational aid. A navigational aid (NAVAID), also known as aid to navigation (ATON), is any sort of signal, markers or guidance equipment which aids the traveler in navigation, usually nautical or aviation travel. Common types of such aids include lighthouses, buoys, fog signals, and day beacons.
A navigator using readings from three satellites could expect accuracy of about 80 feet. [75] On July 14, 1974 the first prototype Navstar GPS satellite was put into orbit, but its clocks failed shortly after launch. [75] The Navigational Technology Satellite 2, redesigned with cesium clocks, started to go into orbit on June 23, 1977. [75]
Polynesian navigation relies heavily on constant observation and memorization. Navigators have to memorize where they have sailed from in order to know where they are. The sun was the main guide for navigators because they could follow its exact points as it rose and set. Once the sun had set they would use the rising and setting points of the ...
Navigational instrument. Navigational instruments are instruments used by nautical navigators and pilots as tools of their trade. The purpose of navigation is to ascertain the present position and to determine the speed, direction, etc. to arrive at the port or point of destination.
A navigation system on an oil tanker. Navigation[1] is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another. [2] The field of navigation includes four general categories: land navigation, [3] marine navigation, aeronautic navigation, and space navigation.
Hanno the Navigator (sometimes "Hannon"; Punic: 𐤇𐤍𐤀, ḤNʾ; [1] Greek: Ἄννων, romanized: Annōn [2]) was a Carthaginian explorer (sometimes identified as a king) who lived during the fifth century BC, known for his naval expedition along the coast of West Africa. However, the only source of said voyage is a periplus ...
Sextant. A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation. The estimation of this angle, the altitude, is known as sighting or shooting ...
European discovery and colonization of the Americas. Between 1492 and 1504, the Italian navigator and explorer Christopher Columbus [a] led four transatlantic maritime expeditions in the name of the Catholic Monarchs of Spain to the Caribbean and to Central and South America. These voyages led to the widespread knowledge of the New World.