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In 1956 the 'Homer' receiver was produced, said to be the first transistorised RDF to be made available to the world's leisure marine market. 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.
NMEA 0183 is a combined electrical and data specification for communication between marine electronics such as echo sounder, sonars, anemometer, gyrocompass, autopilot, GPS receivers and many other types of instruments. It has been defined and is controlled by the National Marine Electronics Association (NMEA).
NMEA 0183 is a combined electrical and data specification for communication between marine electronics such as echo sounder, sonars, anemometer, gyrocompass, autopilot, GPS receivers and many other types of instruments. It has been defined and is controlled by the National Marine Electronics Association (NMEA).
NMEA 2000, abbreviated to NMEA2k or N2K and standardized as IEC 61162-3, is a plug-and-play communications standard used for connecting marine sensors and display units within ships and boats. Communication runs at 250 kilobits-per-second and allows any sensor to talk to any display unit or other device compatible with NMEA 2000 protocols.
The first product was a combined marine receiver and direction finder, for yachts and small boats. From there, the company designed and manufactured products for the marine electronics market, including communications receivers, Navtex receivers, radar detectors, transponders and emergency position indicating radio beacons (EPIRBs).
However, most GPS receivers can automatically derive velocity and direction from two or more position measurements. The disadvantage of this principle is that changes in speed or direction can only be computed with a delay, and that derived direction becomes inaccurate when the distance travelled between two position measurements drops below or ...
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