The fixed jacket platforms are one of the commonly used offshore structures. The jacket launch process includes several steps which should be carefully analyzed to ensure a safe installation procedure. An important consideration for a successful construction is the design of the symmetric jacket frame to prevent the uncontrolled motions during the launch process. However, due to some unavoidable structural imperfections, which may occur during the barge shipment, the existence of some imperfection is inevitable. Therefore, the placement of buoyancy tanks is required to address this problem through the minimization of undesirable motions. In this paper, the effects and performance of the buoyancy tanks are studied by considering the significant parameters such as the jacket motions, velocity components, and the rocker arms. The effect of these variables has been studied on the rotation of jacket and its velocity during launching process. These studies have been discussed in types of jackets with and without buoyancy tanks. Moreover, different local parameters including the sea-water density, winch velocity, drag coefficient, and barge geometrical dimensions are considered as the other important factors of the launch process. As an important result of this research, in addition, it is observed that the buoyancy tanks did not have a major influence on the linear motions through the different degrees of freedom. It is worthy of note that not only the final yaw rotation of the jacket did not vary significantly, but also changes of launch variables did not show feasible effects on the center of gravity and buoyancy of the jacket.