Abstract: According to requirements of the simulated training of the marine rescue, it is necessary for the visual system of rescue ship simulator to introduce the visual simulation of rescue operations in which the line-throwing operation is one of the most important works when doing the ship towing rescue process. In this study, OpenGL is introduced into the visual system developed with Vega Prime, and to achieve that, the hybrid programming is implemented by using the event issued subscription mechanism.  On that basis, the visual simulation of the projectile's motion and ballistic trajectory is achieved by utilizing the internal trajectory model deduced from the energy conservation and the external trajectory model taking the air resistance into account. In consequence, the simulation effect is vivid and intuitional, and it overcomes deficiencies of the exclusive usage of Vega Prime.

Key words: visual simulation, hybrid programming, virtual reality, line-throwing operation, marine rescue