surveying sextant

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• surveying sextant — noun : a light sextant with a large scale used in hydrographic surveying …   Useful english dictionary

• sextant — ► NOUN ▪ an instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation and surveying. ORIGIN originally denoting the sixth part of a… …   English terms dictionary

• Sextant — This article is about the sextant as used for navigation. For the astronomer s sextant, see Sextant (astronomical). : For the history and development of the sextant see Reflecting instruments A sextant is an instrument generally used to measure… …   Wikipedia

• sextant — [ sɛkst(ə)nt] noun an instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation and surveying. Origin C16 (denoting the sixth part… …   English new terms dictionary

• SEXTANT —    an instrument used in navigation (sometimes also in land surveying) for measuring the altitudes of celestial bodies and their angular distances; consists of a graduated brass sector, the sixth part of a circle, and an arrangement of two small… …   The Nuttall Encyclopaedia

• sextant — n. an instrument with a graduated arc of 60(0) used in navigation and surveying for measuring the angular distance of objects by means of mirrors. Etymology: L sextans ntis sixth part f. sextus sixth …   Useful english dictionary

• National Museum of Surveying — The National Museum of Surveying was the Michigan Museum of Surveying, but in 2007, the museum moved to Springfield, Illinois to become a national museum. The museum officially opened in Springfield, Illinois on September 24, 2010. In the 10,000… …   Wikipedia

• Reflecting instrument — Reflecting instruments are those that use mirrors to enhance their ability to make measurements. In particular, the use of mirrors permits one to observe two objects simultaneously while measuring the angular distance between the objects. While… …   Wikipedia

• Inventions in medieval Islam — A significant number of inventions were developed in the medieval Islamic world, a geopolitical region that has at various times extended from Al Andalus and Africa in the west to the Indian subcontinent and Malay Archipelago in the east.… …   Wikipedia

• Jacob's staff — with four transom For the plant known as the ocotillo, sometimes called the Jacob s staff, see ocotillo. The Jacob s staff, also called a cross staff, a ballastella, a fore staff, or a balestilha is used to refer to several things. This can lead… …   Wikipedia

• Navigation — This article is about determination of position and direction on or above the surface of the earth. For other uses, see Navigation (disambiguation). Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. Navigation is the… …   Wikipedia