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2. Fishfinder - Wikipedia

   en.wikipedia.org/wiki/Fishfinder

   This is because the distance between the fish and the transducer changes as the boat passes over the fish (or the fish swims under the boat). When the fish enters the leading edge of the sonar beam, a display pixel is turned on. As the fish swims toward the centre of the beam, the distance to the fish decreases, turning on pixels at shallower ...

3. Deeper Fishfinder - Wikipedia

   en.wikipedia.org/wiki/Deeper_Fishfinder

   Operation of Deeper is based on echolocation and wi-fi technologies. Echolocation is a method for detecting and locating objects submerged in water. When a sound signal is produced, the time it takes for the signal to reach an object and for its echo to return is issued to calculate the distance between the sonar and the object.

4. Fish finder - Wikipedia

   en.wikipedia.org/wiki/Fish_finder

   Fish finder may refer to: Fishfinder , a sonar device attached to a boat, used to measure the amount of fish at various depths underneath the boat Fish identifier, an identification key used in fishing to identify the species of a caught fish

5. Fisheries acoustics - Wikipedia

   en.wikipedia.org/wiki/Fisheries_acoustics

   Target strength (TS) is a measurement of how well a fish, zooplankter, or other target scatters sound back towards the transducer. In general, larger animals have larger target strengths, though other factors, such as the presence or absence of a gas-filled swimbladder in fishes, may have a much larger effect.

6. Coincidence rangefinder - Wikipedia

   en.wikipedia.org/wiki/Coincidence_rangefinder

   Coincidence rangefinders work through the principle of triangulation. In the pictured example, triangulation can be used to determine the range of the ship 𝑑.The position of the lenses A and B are known, and the angle of the lenses α and/or β is set by the operator so that both are aimed at the target.

7. Cingulum - Wikipedia

   en.wikipedia.org/wiki/Cingulum

   Cingulum, from the Latin for belt or girdle, may refer to: Cingulum (brain), white matter fibers found in the brain; Cingulum (tooth), a shelf at the margin of a tooth; A type of groove encircling the theca of dinoflagellates; Cingulum (Catholicism), a rope belt used by monastic order such as the Order of Saint John (Bailiwick of Brandenburg)