The role of surveyors hydrographic in Mapei based marine construction projects is very important. Hydorographic survey, as the name suggests, is the science of measurement and description of features that impact marine activities including maritime navigation and oil exploration. In ancient times, hydrographic surveys were conducted by studying the tides, currents and submerged obstructions. Modern day hydrographic surveyors use top notch radio devices and advanced visual equipment to gather exact data about seas. These surveyors are well-versed in acquisition and processing of hydrographic data, positioning and charting. For all types of marine surveys, hydrographic surveyors are the best choice for a majority of contractors.