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From the Musée de la Marine, Paris. 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.
Raymarine is a manufacturer and major supplier of electronic equipment for marine use. The company targets both recreational and light commercial markets with their products, which include: GPS Chartplotters; VHF Radios; Digital Fishfinders / Sonar; Radar; Self-steering gear (Autohelm / Autopilot) Satellite television; Software
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.
Virtual speedometers typically approximate speed based on distance traveled over time with the help of a satellite radio navigation system, such as GPS. Virtual speedometers tend to be less accurate than their analog counterparts and are affected by environmental factors such as weather conditions, terrain, and obstructions in the way 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.
Radars are rarely used alone in a marine setting. A modern trend is the integration of radar with other navigation displays on a single screen, as it becomes quite distracting to look at several different screens. Therefore, displays can often overlay an electronic GPS navigation chart of ship position, and a sonar display, on the radar display ...