The GPS Fish Positioning System was developed by Icelandic company Star-Oddi and Simrad in cooperation with the marine research institutes in Norway and Iceland.
The fish positioning system allows the scientist to track the migratory route of the fish through a whole year cycle.
The system consist of:
Each data storage tag includes a GPS acoustic receiver as well as temperature and depth sensors. The tags will withstand depths down to 3000 meters, and with a battery life of up to three years, each sensor can provide detailed information on how and where each tagged fish migrates.
The GPS information is provided by Simrad sonars, as skippers on commercial fishing vessels power up their sonars and allows them to run in "GPS mode" to and from their fishing fields. In this mode, the sonar will take the vessel's current position from the positioning system, and transmit this information into the water. The position information is picked up by the fish tags, and stored in the memory. Once a tagged fish is caught, the small white sensor is returned to the research institute to have all its secrets revealed.
The Simrad SX90, SP60, SP70 and SP90 sonars can provide the "GPS Mode". These sonars can typically transmit their acoustic signals to an area exceeding 100 km2 in only one hour of sailing at 9 knots.
For more information about the GPS fish positioning system, visit Star-Oddi's web site.
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