多數 Garmin 航圖機即使沒有內建聲納也可加載 Garmin CHIRP 聲納、Garmin CHIRP DownVü™ 和 CHIRPSideVü™ 掃描聲納來清晰呈現水中畫面。Garmin致力於簡便的操作性能，讓聲納模組易於安裝、易懂且容易使用。
NEW
GSD 26 Asia
Panoptix LiveScope System
Ultra High-Definition Scanning Sonar System
GSD™ 24 Advanced Sonar Module
The GSD 24 features a vastly improved digital sonar design for superior target definition and deep-water performance.
GSD™ 26 CHIRP Professional Sonar Module
The GSD 26 digital sonar ushers in the next evolution of sportfishing technology, providing unrivaled target separation at far greater depths than traditional sonar.
GSD™ 25
GCV™ 10 Scanning Sonar Module
The GCV 10 black box sonar adds both SideVü and ClearVü with CHIRP scanning sonar technologies to your compatible Garmin echoMAP or GPSMAP series combo (see compatible devices). CHIRP technology sweeps through a range of frequencies to give you an ultra-clear sonar picture of objects, structure and fish that pass below (ClearVü) and to the sides (SideVü) of the boat.