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Hella GmbH & Co. KGaA is an internationally operating German automotive parts supplier headquartered in Lippstadt, North Rhine-Westphalia.The company develops and manufactures lighting, electronic components, and systems for the automotive industry.
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).
The way in which the Yeoman plotter combines speedy GPS position fixing with a paper chart is cited as a benefit for two principal reasons. The first is one of safety and reliability - even the best marine electronics fail from time to time, and if the boat's electronic instruments should cease to work then a recent pencil plot on a paper chart becomes extremely valuable.
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).
A Raymarine chartplotter. A chartplotter is a device used in marine navigation that integrates GPS data with an electronic navigational chart (ENC).. The chartplotter displays the ENC along with the position, heading and speed of the ship, and may display additional information from radar, automatic information systems (AIS) or other sensors.
The term chronometer is also used to describe a marine chronometer used for celestial navigation and determination of longitude. The marine chronometer was invented by John Harrison in 1730. This was the first of a series of chronometers that enabled accurate marine navigation. From then on, an accurate chronometer was essential to open-ocean ...
John Harrison (3 April [O.S. 24 March] 1693 – 24 March 1776) was an English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of how to calculate longitude while at sea.
Using this system, the navigator does not immediately update every chart in the portfolio when a new Notice to Mariners arrives, instead creating a card for every chart and noting the correction on this card. When the time comes to use the chart, he pulls the chart and chart's card, and makes the indicated corrections on the chart.
