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  2. Chip log - Wikipedia

    en.wikipedia.org/wiki/Chip_log

    Over time, log construction standardized. The shape is a quarter circle, or quadrant with a radius of 5 inches (130 mm) or 6 inches (150 mm), [1] and 0.5 inches (13 mm) thick. [1] The log-line attaches to the board with a bridle of three lines that connect to the vertex and to the two ends of the quadrant's arc.

  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. Vessel monitoring system - Wikipedia

    en.wikipedia.org/wiki/Vessel_monitoring_system

    The system is operated 24/7 by Havs- och vattenmyndigheten (The Swedish Agency for Marine and Water Management) and monitors all fishing vessels >= 12 m LoA. Number of vessels being monitored: 184 [2013-05-22].

  5. Portsmouth Yardstick - Wikipedia

    en.wikipedia.org/wiki/Portsmouth_Yardstick

    Each boat's time is adjusted with the formula, and then the adjusted scores are compared to determine the outcome of the race. For example, a PD Racer (a semi-open homebuilt class, and the slowest listed boat in the USA scheme) has a D-PN of 140, and an A-Scow (the fastest listed centreboard boat) has a D-PN of 61.3. If an A Scow takes 1 hour ...

  6. Fishfinder - Wikipedia

    en.wikipedia.org/wiki/Fishfinder

    When the fish swims directly under the transducer, it is closer to the boat so the stronger signal shows a thicker line. As the fish swims away from the transducer, the distance increases, which shows as progressively deeper pixels. The image to the right shows a school of white bass aggressively feeding on a school of threadfin shad. Note the ...

  7. Fishing vessel - Wikipedia

    en.wikipedia.org/wiki/Fishing_vessel

    A fishing vessel is a boat or ship used to catch fish and other valuable nektonic aquatic animals (e.g. shrimps/prawns, krills, coleoids, etc.) in the sea, lake or river. Humans have used different kinds of surface vessels in commercial, artisanal and recreational fishing.