GSD 21 Remote Sounder
Discontinued. The GSD 21 has been replaced by the Garmin GSD 22 Remote Sounder>>
depth to your chartplotter view with the GSDT 20 series remote
sounders. The 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 CANetT and Marine Networks.
GSD 21 is a black-box sounder that provides fast UltrascrollT
displays and 500-watt (RMS) sounder capability to 2000 series
and 292/392/492 series chartplotters featuring the Garmin CANetT
bus. The GSD 21 will work with a serial connection to other Garmin
plotters without the CANet connection, but will not offer UltrascrollT
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.
Note: This product does not include a transducer. Garmin offers
a complete selection
of transducers to be purchased separately as accessories.
Compatibility: The GSD 21 is compatible with CANet (GPSMAP
X9X, 21XX, 22XX) series and previous chartplotters. Click here for a complete list of compatible marine units.