Hydrographic Surveys Offshore—Error Source

by Ralph H. Cross, (M.ASCE), Dir. of Envir. Programs; Alpine Geophysical Assoc., Norwood, NJ,


Serial Information: Journal of the Surveying and Mapping Division, 1974, Vol. 100, Issue 2, Pg. 83-93


Document Type: Journal Paper

Abstract: Waves at sea limit both the resolution and accuracy of bathymetric surveys. Vessel roll introduces errors difficult to correct. By limiting operations to calm days according to criteria given, these errors can be controlled. Heave and roll appear as wiggles on the record, masking bottom irregularities. Speed limitations are given to assure seeing irregularities of a given size. Three tidal datum plan are defined, and indirect methods of obtaining offshore tidal data are described.

Subject Headings: Tides | Ocean waves | Sea water | Seas and oceans | Bathymetry | Geomatic surveys | Heave

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