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A sounding line or lead line is a length of thin rope with a plummet, generally of lead, at its end. Regardless of the actual composition of the plummet, it is still called a "lead". Leads were swung, or cast, by a leadsman, usually standing in the chains of a ship, up against the shrouds. [4] Measuring the depth of water by lead and line dates ...
The top manufacturer is Garmin's Marine division with a turnover of US$917 Million in 2023 [8] followed by Brunswick-owned Navico Group (Simrad, Lowrance, B&G and several other brands), with a turnover of US$915 Million (although this includes sales of equipment which is not marine electronics, such as batteries, cables and pumps).
LBL systems are unique in that they use networks of sea-floor mounted baseline transponders as reference points for navigation. These are generally deployed around the perimeter of a work site. The LBL technique results in very high positioning accuracy and position stability that is independent of water depth.
Lead line (nautical) Add languages. ... Download QR code; Print/export ... Appearance. move to sidebar hide. From Wikipedia, the free encyclopedia. Redirect page ...
A pelorus is useful, for instance, in determining the moment at which an aid to navigation is broad on the beam. It is also useful in measuring pairs of relative bearings which can be used to determine distance off and distance abeam of a navigational aid. If the true heading is set at the lubber's line, true bearings are observed directly.
Navman F20. Established by Sir Peter Maire in 1986 as New Zealand-based Talon Technology, Navman (as the company became known in the 1990s) is a GPS systems company providing stand-alone GPS units, OEM GPS modules, GPS software for Palm handhelds and Pocket PCs, automotive navigation systems and navigation systems for use at sea.
In a wider sense the phrase "sea mark" is often understood to include all types of landmarks, structures and devices that can be used to provide warning and guiding signs to mariners. Thus a sea mark can be and often is located on dry land. Examples of land-based sea marks are various signal lights and leading marks.
Diagram of a chip log attached to a log-line and reel on a ship. A chip log, also called common log, [1] ship log, or just log, is a navigation tool mariners use to estimate the speed of a vessel through water. The word knot, to mean nautical mile per hour, derives from this measurement method.
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