According to the filed surveys, and researches at Vung Tau anchorage, this paper built the researching model, calculation and simulation process of how currents affect the anchored vessel within the area. From there, the CFD application helps to calculate the tension on the anchor chain. To emphasize to research, the authors used filed survey data at Vung Tau anchorage, relevant basic numbers and the particular vessel, the M/T Aulac Jupiter for proving the effective of the calculation. At the same time, it is combined with the anchorage hold for a particular vessel, taking into account conditions such as type of vessels, anchor types, draft, depth, vessels’ bottom material, etc. Therefore, the research provides useful recommendations on the anchor chain tension for eliminating anchoring which leads to marine incidents in the anchorage.