From a practical point of view, this procedure is convenient as a tool for examining near shore coastal area before a high resolution hydrographic survey is carried out by using expensive instrument such as Multi-beam echo sounder etc. By using the results of this tool, marine surveyors can assess the current amount of change in depth and if a weaker R2 value is observed, it necessitates the update of high resolution hydrographic chart to the existing one. To derive the bathymetry using satellite imagery, environmental conditions such as water clarity, cloud cover, a sunglint is needed to be considered that could degrade the accuracy of estimated depth.