Abstract: In order to raise operational capability of a submarine via salvo of acoustic homing torpedoes, this paper investigates the issue of continuous firing at double targets, analyses the basic requirements of the torpedo application during attack process, and solves such problems as mutual guidance of the homing devices, mutual influence of torpedo explosion, and colliding with each other during torpedo running. Moreover, it proposes some tactics for a submarine to salvo enemy ships at different firing positions based on the analysis of the positions.