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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 ...
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.
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
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:
The locator is mounted in a hydrodynamic shell, or "tow fish", connected by winch behind a surface vessel across the search area. The locator listens for the sound emanating from the beacon or "pinger". Once located, the beacon and its attached recorders can be retrieved by divers, submersibles or remotely operated vehicle (ROV), depending on ...
Giant hummingbird: Patagona gigas (Vieillot, 1824) 196 Violet-chested hummingbird: Sternoclyta cyanopectus (Gould, 1846) 197 Scissor-tailed hummingbird: Hylonympha macrocerca Gould, 1873: 198 Rivoli's hummingbird: Eugenes fulgens (Swainson, 1827) 199 Talamanca hummingbird: Eugenes spectabilis (Lawrence, 1867) 200 Fiery-throated hummingbird