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Garmin GSD 21 Remote Sounder - Description
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Add depth to your chartplotter view with the GSD 20 series remote sounders. The Garmin GSD 21, a
powerful analog sonar, along with the GSD 22, Garmin's first digital sonar, are robust units designed to
operate with stand-alone chartplotters or integrate with the Garmin CANet and Marine Networks.
NOTE: The Garmin GSD 21 Remote Sounder requires a transducer to receive sonar frequencies. If
you don't already own one, please choose a transducer below.
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Garmin GSD 21 Remote Sounder - Continued
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The GSD 21 is a black-box sounder that provides fast Ultrascroll displays and 500-watt (RMS) sounder
capability to 2000 series and 292/392/492 series chartplotters featuring the Garmin CANet bus. The
GSD 21 will work with a serial connection to other Garmin plotters without the CANet connection, but will
not offer Ultrascroll capability. The unit's all-new, high-dynamic range analog sonar receiver provides
exceptional performance in water as shallow as one foot on down to depths of 1,500 feet. It connects to a
dual frequency transducer (50/200 kHz) for deep-water performance or a single frequency, dual beam
width transducer (narrow/wide) for operation in shallow freshwater as well as deeper water. Provides
500 W transmit power with dual frequency transducer or 400 W with dual beam width transducer.
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