Garmin GSD-20 Manuale Utente

Thank you for choosing the Garmin GSD 20. The GSD 20 is an intelligent, remote sounder module designed to include powerful features 

as found in other Garmin sounders, including Depth Control Gain (DCG

®

) and See-Thru

®

 technology. When used with compatible Garmin 

chartplotters, it provides full-featured depth sounder functions. It may interface to multiple head units, providing for complete sounder control 

from multiple stations, including transmit frequency, range, and gain adjustments. To get successful results from your GSD 20, take time to read 

through this installation guide. If any items are missing, please contact your Garmin dealer immediately.

• GSD 20 Sounder Module
• 30’ (9.1 m) Power/Data Cable 
• Installation Guide for the GSD 20

The transducer acts as the eyes and ears of your new sonar. The transducer transmits sound waves toward the bottom in a cone shape. The larger 

the cone angle, the larger the coverage area at a given depth. 
Proper transducer selection and installation are critical to the operation of your unit. Since mounting locations vary, see your local dealer or 

contact Garmin Product Support for further information. A full list of transducers can be found at www.garmin.com.

I

NTRODUCTION

 

Power/Data 

Connector

LED Status Indicator

Transducer 

Connector

Mounting Holes