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When the fish swims directly under the transducer, it is closer to the boat so the stronger signal shows a thicker line. As the fish swims away from the transducer, the distance increases, which shows as progressively deeper pixels. The image to the right shows a school of white bass aggressively feeding on a school of threadfin shad. Note the ...
Deeper Smart Sonar is a wireless, castable echo-sounder compatible with iOS and Android smartphones and tablets. Wi-Fi connection enabled to maximize both the distance between the sounder and the device holder up to 330 ft / 100 m and the depth range up to 260 ft / 80 m.
Angles are measured by the transceiver, which contains an array of transducers. The transceiver head normally contains three or more transducers separated by a baseline of 10 cm or less, hence the "short baseline" name. A method called “phase-differencing” within this transducer array is used to calculate the direction to the subsea ...
Other types of transducers include variable-reluctance (or moving-armature, or electromagnetic) transducers, where magnetic force acts on the surfaces of gaps, and moving coil (or electrodynamic) transducers, similar to conventional speakers; the latter are used in underwater sound calibration, due to their very low resonance frequencies and ...
A depth finder may refer to any of the following: Sonar: use of underwater sound propagation to measure depth; Fathometer or fishfinder: a device to locate fish at various water depths; Echo sounding: a technique using sound pulses to measure depth; sounding line: a length of rope used to measure water depth
Firstly, the surveyor can use an air filled metal bar lowered below the transducer, attached at each end by a rope marked with depth values. If the values on the rope can be assumed to be correct, then the bar is lowered at set depth intervals and observed on the echo sounder trace. The values of echo sounder depth can be plotted against the ...
Phase-shift keying (PSK) is a digital modulation scheme that conveys data by changing (modulating) the phase of a reference signal (the carrier wave). The signal is impressed into the magnetic field x,y area by varying the sine and cosine inputs at a precise time. It is widely used for wireless LANs , RFID and Bluetooth communication.
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
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