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  2. Submarine navigation - Wikipedia

    en.wikipedia.org/wiki/Submarine_navigation

    Surfaced submarines entering and leaving port navigate similarly to traditional ships but with a few extra considerations because most of the boat rides below the waterline, making them hard for other vessels to see and identify. Submarines carry an inertial navigation system, which measures the boat’s motion and constantly updates position ...

  3. Chartplotter - Wikipedia

    en.wikipedia.org/wiki/Chartplotter

    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.

  4. Chip log - Wikipedia

    en.wikipedia.org/wiki/Chip_log

    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.

  5. Speedometer - Wikipedia

    en.wikipedia.org/wiki/Speedometer

    A speedometer or speed meter is a gauge that measures and displays ... eg. boats use a ... Some GPS devices do not take into account the vertical position of the car ...

  6. Pitometer log - Wikipedia

    en.wikipedia.org/wiki/Pitometer_log

    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 ...

  7. Marine electronics - Wikipedia

    en.wikipedia.org/wiki/Marine_electronics

    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).

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