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2. Poropanchax - Wikipedia

   en.wikipedia.org/wiki/Poropanchax

   Poropanchax myersi (Poll, 1952) (Hummingbird lampeye) Poropanchax normani (C. G. E. Ahl, 1928) (Norman's lampeye) Poropanchax rancureli (Daget, 1965) (Rancurel's lampeye) Poropanchax stigmatopygus Wildekamp & Malumbres, 2004; A seventh species is recognized by Catalog of Fishes, but not by FishBase where considered a synonym of P. luxophthalmus:

3. Fishfinder - Wikipedia

   en.wikipedia.org/wiki/Fishfinder

   Typical values used by commercial fish finders are 4921 ft/s (1500 m/s) in seawater and 4800 ft/s (1463 m/s) in freshwater. [ citation needed ] The process can be repeated up to 40 times per second and eventually results in the bottom of the ocean being displayed versus time (the fathometer function that eventually spawned the sporting use of ...

4. Towed pinger locator - Wikipedia

   en.wikipedia.org/wiki/Towed_pinger_locator

   How a towed pinger locator is deployed. A towed pinger locator is a water-borne device used to locate the sonar "ping" from the underwater locator beacon which is fitted to the Cockpit Voice Recorders and Flight Data Recorders installed in commercial airliners. [1] They can locate pingers at depths of up to 20,000 feet (6,100 m) underwater. [2]

5. 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.

6. Underwater locator beacon - Wikipedia

   en.wikipedia.org/wiki/Underwater_locator_beacon

   A 4-inch (100 mm) underwater locator beacon, with ballpoint pen for scale A ULB attached to a bracket on a cockpit voice recorder. An underwater locator beacon (ULB), underwater locating device (ULD), or underwater acoustic beacon is a device that emits an acoustic pulse intended to guide searchers equipped with a suitable receiver to the location of the beacon underwater.

7. 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