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A chip log consists of a wooden board attached to a line (the log-line). The log-line has a number of knots at uniform intervals. The log-line is wound on a reel so the user can easily pay it out. Over time, log construction standardized. The shape is a quarter circle, or quadrant with a radius of 5 inches (130 mm) or 6 inches (150 mm), [1] and ...
A sailor ran the chip log and another sailor the sandglass. The slide of the pulled over the stern and let run the first length of line till the quadrant was stabilized in the water. The sailor was leaving to run the line to pass freely leaving the slide by hand and touching the first knot sang "mark!" At the moment of the inverted glass and ...
Analog multiplier. In electronics, an analog multiplier is a device that takes two analog signals and produces an output which is their product. Such circuits can be used to implement related functions such as squares (apply same signal to both inputs), and square roots. An electronic analog multiplier can be called by several names, depending ...
Back staff, the best known of which is the Davis' quadrant. It could measure the altitude of the Sun without having the navigator directly observe the Sun. Cross staff, an older instrument long out of use. Kamal Very simple instrument used primarily by Arabian navigators. It consists of a small board with a knotted piece of twine through the ...
The evidence at the center of Quadrant's motion is a spreadsheet included in an expert testimony that contained composition and characteristics of several rare-earth magnets produced by the company.
The diagram of the chip log does not match the description. Michael Daly 05:46, 1 September 2007 (UTC) I've updated the page to reflect the historical development a bit more and clarify where possible. I've added two images, one that matches the description of the shape as a quadrant and the other showing the entire kit.
Electromagnetic log. An Electromagnetic Log, sometimes called an "EM log", is an electronic sensor which measures the speed of a vessel through sea water. Like many other technologies, its name derives from the traditional chip log. It makes use of Faraday's law of induction by measuring the EMF induced in water moving through a magnetic field ...
Logbook (nautical) Logbook aboard the frigate Grand Turk. A logbook (a ship's logs or simply log) is a record of important events in the management, operation, and navigation of a ship. It is essential to traditional navigation, and must be filled in at least daily. The term originally referred to a book for recording readings from the chip log ...