Hydrographic Survey Boat Operations for Boatmasters
,Hydrographicsurveyisthescienceofmeasurementanddescriptionoffeatureswhichaffectmaritimenavigation,marineconstruction,dredging,offshorewindfarms,offshoreoilexplorationanddrillingandrelatedactivities.,Thedatumtowhichdepthsaretobereducedisfundamenta...。參考影片的文章的如下: