100% Canadian Owned and Operated! 100% Canadian. Canada's #1 GPS & More Store!
We take Visa, Mastercard, PayPal
Sign in | View cart | Contact us
Prices are in CDN dollars GPS Prices in Canadian Dollars
social follow buttons


follow us on facebook follow us on twitter follow us on instagram

GARMIN GSD 21 Remote Sounder

Discontinued. The GSD 21 has been replaced by the Garmin GSD 22 Remote Sounder>>

Add 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.

The 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.

Please 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.

Installation Instructions: Click here (pdf)

View Cart
Garmin GSD 21 Remote Sounder Accessories

garmin gsd 21

Standard purchase includes:
• GSD 21
• Marine CANet/power cable(6 ft)
• Serial/power cable(6 ft)

Cable Grommet
CANet cable (40 ft)
CANet terminators
• CANet hardware and installation instructions

GSD 21 Remote Sounder (Transducer not included)

© 2001-2019
GPS Central
#8, 711 48th Ave SE Calgary AB Canada T2G 4X2
Since 2001 - Factory Authorized Dealer

Sitemap | Terms of Use | Privacy Policy