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The hydro graphic echosounder HydroStar 4900 is a modular echosounder system, available as stand-alone equipment or integrated into a 19 inch rack.
Frequency range from 10 kHz to 1 MHz.
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The HydroStar 4300 is a single beam survey echosounder, available as single or dual-frequency unit, with a wide range of possible operating frequencies from 28 to 210 kHz.
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