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PDF Pack. People also downloaded these PDFs How it works An echo-sounder sends an acoustic pulse directly downwards to the seabed and records the Ultracompact Dual Frequency Echosounder. 200kHz / 450kHz (choice of pining modes : single or dual). Minimum measurable range : 15cm. Max range : 200m. For a long time, the echosounder has been an indispensable aid to navigators. Its ability to supply depth measurements in practically all weather conditions Consult Simrad's entire Echo sounder brochures catalogue on NauticExpo. Page: 1/36. Singapore rico.com.sg. 120 4.7". 100 3.9". 112 4.4" fixing hole. 4-Φ7. 252 9.9". 190 7.5". 170 6.7". FE. Product Name. NAVIGATIONAL ECHO SOUNDER.Echo sounder. JFC-800/810. ◦ Advanced digital signal processing. ◦ 10.4-inch sunlight viewable display. ◦ Two models; standard and high sensitivity. ➢Echo-sounder is primary acoustic equipment used for navigation and for fish finding purposes. ➢It works on the principle of sound wave propagation. ES80 ECHOSOUNDER. SIMRAD has manufactured fishfinders for more than 70 years and has 25 years of experience using Split beam technology. The. This is easily achieved in modern sounders. Echosounders measure the depth of water beneath them by sending out a sound pulse towards the sea bed and measuring.