Abstract: The main objective of this research is to utilize the Fuzzy arithmetic for constructing surface current and ocean bathymetry from polarized remote sensing data such as TOPSAR image. In doing so, three- dimensional surface modelling consisted of Volettra model, non-linear model which construct a global topological structure between the data points, used to support an approximation of real surface. The output of the Fuzzy and Volettra model was a digital terrain model for bathymetry along the coastal waters of Kuala Terengganu Malaysia. This paper describes the principles behind the Fuzzy algorithm, indicates for what type of application it might be useful, notes on the accuracy and gives an example of an application.