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| Hydrographic River and Lake / Reservoir Surveys |
| Calm Water surveys are carried out using an inflatable dinghy, equipt either with echo sounder or a long ranging pole to survey river and lake beds, depending on conditions. Harbour surveys can be carried out in calm conditions. Position is measured by either robotic total station or GPS. |
Lake River Harbour and calm water hydro surveys
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carried out using RTK GPS
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and Sonarmite echo sounder
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