Abstract Anti-Slamming Bulbous Bow (ASB) is a bulbous bow that has been modified according to the Anti-Slamming principle. For waters that have varying wave heights, for example, in the East Nusa Tenggara region where waters meet the criteria for the application of anti-slamming technology and are related to the existence of several offshore buildings and the use of tugging supply vessels (AHTS) for the benefit of the region. This research was conducted to determine the effect of installing anti-slamming bulbous bow and Anti-slamming height on the total resistance of the ship using numerical methods with the help of CFD software. The method used is to vary the height of anti-slamming and the type of bulbous bow on the bow of the ship. Ship modeling is carried out with CAD Software, and while the obstacle analysis uses CFD Tdyn software. Based on the analysis that has been done, the effect of the anti-slamming bulbous bow on the total resistance value of the ship without an anti-slamming bulbous bow is reduced by 3.75%. The ship model, with the use of the anti-slamming bulbous bow, which has the smallest total resistance, is the ship with the form of anti-slimming bulbous bow type Delta (Δ - Type).