Echo sounding is the technique used for the sound pulses transmitted to the water to find the depth of water. The interval from the emission of a pulse to reception of its echo is recorded, and the depth calculated from the known speed of propagation of sound through water. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes. Our brands are mentioned below;

ECHO SOUNDER

SIMRAD – S2009, S2016, S3009
http://www.navico-commercial.com/en-US/Products/Echosounders/
FURUNO – FE 700, FE 800
JRC – JFE 380, JFE 680, JFE 180, JFE 800
GARMIN
SAMYUNG
ONWA