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The first fishfinder, i.e. sonar device meant to find underwater fish or schools of fish, was invented in Japan in the 1940s by the Furuno brothers, who were radio repairmen. Building from the knowledge of fishermen who were able to determine the presence of fish, and their number, from bubbles, the Furuno brothers first planned to detect these ...
One of the first commercial echo sounding units was the Fessenden ... A fishfinder is an echo sounding device used by both recreational and commercial fishers.
Furuno Electric Shokai was founded in Nagasaki, Japan in 1948. The same year, Furuno commercialized the world's first practical fish finder.Manufacturing continued to ramp up as the decade came to a close, and by the mid-1950s, Furuno was producing various Marine supplements, such as early examples of commercial Marine radars.
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
Acoustic traces of sprat schools recorded by Bokn in Frafjord, Norway was the first echogram of fish to be published. [4] In 1935, Norwegian scientist Oscar Sund reported observations of cod schools from the research vessel Johan Hjort, [ 5 ] marking the first use of echosounding for fisheries research.
Researchers say they've discovered the first known fully warm-blooded fish. It's called the opah, or moonfish, and it lives in cold environments deep below the ocean's surface. Scientists say the ...
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