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A marine parachute anchor for a large yacht awaiting bagging up. A conical sea anchor with tripline (from an illustration in The Sailors Handbook by Halsey C. Herreshoff). An early wooden drogue. A sea anchor (also known as a parachute anchor, drift anchor, drift sock, para-anchor or boat brake) is a device that is streamed from a boat in heavy ...
The DMC provides emergency Earth imaging for disaster relief under the International Charter for Space and Major Disasters, which the DMC formally joined in November 2005. Other DMC Earth imagery is used for a variety of civil applications by a variety of governments. Spare available imaging capacity is sold under contract.
The term can be applied to many nautical situations: Foul hawse — when a ship lying to two anchors gets the cables crossed. [2]Foul bottom — in reference to a seafloor that has poor qualities for securing an anchor, such as hard rocks, coral, wreckage, or other impediments that would make securing or unsecuring an anchor difficult or impossible.
Auto anchor— the anchor is automatically built by concatenating (running together) template fields such as the author last names and the year (e.g. SmithJones1999) Custom anchor— the anchor is created from text defined in a field; Reference- anchor— the anchor consists of Reference- plus the defined text; Anchor types can be combined.
Single helix earth anchors Guyed mast anchor. An earth anchor is a device designed to support structures, most commonly used in geotechnical and construction applications. Also known as a ground anchor, percussion driven earth anchor or mechanical anchor, it may be impact driven into the ground or run in spirally, depending on its design and intended force-resistance characteristics.
Irish publisher of nautical charts Robert Blachford organized manufacture of such anchors and printed a book [6] on them to promote their use in 1823. [7] Hawkins' anchor was tested by the Dutch Navy in 1825 which dismissed it as not holding well in mud. [8] It's believed that the invention appeared ahead of its time and thus wasn't adopted. [9]
A cable length or length of cable is a nautical unit of measure equal to one tenth of a nautical mile or approximately 100 fathoms.Owing to anachronisms and varying techniques of measurement, a cable length can be anywhere from 169 to 220 metres (185 to 241 yd), depending on the standard used.
Coordinate conversion is composed of a number of different types of conversion: format change of geographic coordinates, conversion of coordinate systems, or transformation to different geodetic datums. Geographic coordinate conversion has applications in cartography, surveying, navigation and geographic information systems.