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Model of chip log and associated kit. The reel of log-line is clearly visible. The first knot, marking the first nautical mile is visible on the reel just below the centre. The timing sandglass is in the upper left and the chip log is in the lower left. The small light-coloured wooden pin and plug form a release mechanism for two lines of the ...
Over the course of the 1950s, B&G, then based in Lymington on the south coast of England, extended its activities into echo sounders and in 1960 produced its first speedometer. In 1966 the ketch Gypsy Moth IV , the yacht which earned Sir Francis Chichester his single-handed circumnavigation record, was equipped with a full suite of B&G instruments.
In addition, marine navigation software often has option to control external autopilot for automated boat navigation. It may incorporate GRIB weather overlay on the chart, Tide predictions and other related information services of additional use to mariners. Free open source marine navigation software. OpenCPN (Cross-platform) open source and free
To counter this effect, more advanced navigation systems use additional sensors like a compass or an inertial navigation system to complement GPS. Doppler Velocity Log (DVL): Some ships are equipped with sonar instruments that can measure the Doppler shift in a sound pulse generated by the ship's motion as it reflects off the ocean bottom or ...
Other vehicles may use devices analogous to the speedometer with different means of sensing speed, eg. boats use a pit log, while aircraft use an airspeed indicator. Charles Babbage is credited with creating an early type of a speedometer, which was usually fitted to locomotives. [2]
Svetlana Dali, the woman accused of stowing away on a flight from New York to Paris, was arrested again, according to the FBI.
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