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• 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

• Sounding line — A sounding line or lead line is a length of thin rope with a plummet, generally of lead, at its end. No matter what metal the plummet is made of, it s still referred to as the lead. In the recent past, depths were measured in fathoms, although… …   Wikipedia

• sounding line — noun (nautical) plumb line for determining depth • Syn: ↑lead line • Topics: ↑seafaring, ↑navigation, ↑sailing • Hypernyms: ↑plumb line, ↑ …   Useful english dictionary

• Depth sounding — refers to a historical nautical term for measuring depth; it is often referred to simply as sounding. Sounding is finding the depth of a given point in a body of water. Sounding data is used in bathymetry to make maps of the floor of a body of… …   Wikipedia

• Echo sounding — pulses directed from the surface or from a submarine vertically down to measure the distance to the bottom by means of sound waves. HistoryAfter the disaster of the Titanic in 1912, the German physicist Alexander Behm conducted some research to… …   Wikipedia

• Soundings — Sounding is a historical nautical term for measuring depth. The term probably originated from the expression of sounding the well mdash; the well being a shaftlike structure in old sailing vessels that reached all the way to the lowest part of… …   Wikipedia

• Glossary of nautical terms — This is a glossary of nautical terms; some remain current, many date from the 17th 19th century. See also Wiktionary s nautical terms, Category:Nautical terms, and Nautical metaphors in English. Contents: A B C D E F G H I J K L M N O P Q R …   Wikipedia

• 2008 in spaceflight — |11 January, 05:32 GMT [cite web url= http://sites.wff.nasa.gov/code810/news/story80.html title= 36.243 UG McCandliss/Johns Hopkins University accessdate= 2008 03 15 author= date= 2008 01 11 format= html publisher= NASA Sounding Rockets Office… …   Wikipedia

• Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …   Wikipedia

• spaceflight — /spays fluyt /, n. the flying of manned or unmanned spacecraft into or in outer space. Also, space flight. [1945 50; SPACE + FLIGHT1] * * * Introduction  flight beyond Earth s atmosphere. This article deals with the basic concepts associated with …   Universalium

• launch vehicle — Aerospace. a rocket used to launch a spacecraft or satellite into orbit or a space probe into space. [1955 1960] * * * Rocket system that boosts a spacecraft into Earth orbit or beyond Earth s gravitational pull. A wide variety of launch vehicles …   Universalium