Ports and harbor surveys cover a collection of topographic elevations and hydrographic depths to assess the condition of navigation channels to quantify and determine dredging requirements, the condition of navigation structures, such as jetties and breakwaters, and adjacent shoreline. Such surveys are typically conducted for national or state governments, as well as local port authorities. This often involves a baseline survey and subsequent "call out" surveys to monitor the change in conditions in the port and harbor.
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