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  2. Side-scan sonar - Wikipedia

    en.wikipedia.org/wiki/Side-scan_sonar

    The first commercial side-scan system was the Kelvin Hughes "Transit Sonar", a converted echo-sounder with a single-channel, pole-mounted, fan-beam transducer introduced around 1960. In 1963 Dr. Harold Edgerton, Edward Curley, and John Yules used a conical-beam 12 kHz side-scan sonar to find the sunken Vineyard Lightship in Buzzards Bay ...

  3. Fishfinder - Wikipedia

    en.wikipedia.org/wiki/Fishfinder

    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 ...

  4. Echo sounding - Wikipedia

    en.wikipedia.org/wiki/Echo_sounding

    Most hydrographic operations use a 200 kHz transducer, which is suitable for inshore work up to 100 metres in depth. Deeper water requires a lower frequency transducer as the acoustic signal of lower frequencies is less susceptible to attenuation in the water column. Commonly used frequencies for deep water sounding are 33 kHz and 24 kHz.

  5. Sonar - Wikipedia

    en.wikipedia.org/wiki/Sonar

    The counter-countermeasure was a torpedo with active sonar – a transducer was added to the torpedo nose, and the microphones were listening for its reflected periodic tone bursts. The transducers comprised identical rectangular crystal plates arranged to diamond-shaped areas in staggered rows.

  6. 1995 NASCAR Busch Series - Wikipedia

    en.wikipedia.org/wiki/1995_NASCAR_Busch_Series

    The Humminbird Fishfinder 500K was held July 22 at Talladega Superspeedway. Jeff Purvis won the pole. Top ten results. 23–Chad Little; 20–Jimmy Spencer; 8–Kenny Wallace; 87–Joe Nemechek; 74–Johnny Benson; 90–Mike Wallace; 40–Patty Moise; 75–Rick Wilson; 52–Ken Schrader; 38–Elton Sawyer

  7. Mariah Carey Breaks Her Own Record, Celebrates 'All I Want ...

    www.aol.com/mariah-carey-breaks-her-own...

    In 2019, it topped the charts during the holiday season for three weeks. The song has remained popular since. It spent two weeks at the top in 2020, three weeks in 2021, four weeks at the top in ...

  8. The Best High-Yield Dividend ETF to Invest $2,000 in Right Now

    www.aol.com/best-high-yield-dividend-etf...

    JEPQ data by YCharts.. Long-term dividend yields. The monthly payouts added up to $5.38 per share over the last year, or a 10.7% yield against the current share price of approximately $58.

  9. Tonpilz - Wikipedia

    en.wikipedia.org/wiki/Tonpilz

    The term tonpilz or "acoustic mushroom" may refer to a certain type of underwater electro-acoustic transducer. By sandwiching active (i.e. piezoelectric or magnetostrictive) materials between a light, stiff radiating head mass and a heavy tail mass, the transducer can effectively operate as either a projector (source) or a hydrophone (underwater acoustic receiver).

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