As shown in the illustrated echo sounding display unit and control panel and pertinent operating characteristic tables, what situation would require increasing the unit gain? Illustration EL-0186

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transitioning from a stone/rock seabed to a sand seabed

Answer

transitioning from a sand seabed to a stone/rock seabed

Answer

transitioning from a sand/mud seabed to a sand seabed

Answer

transitioning from a soft mud seabed to a mud/sand seabed

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