在LOFIX定位原理的基础上，建立了被动全向浮标LOFIX定位数学模型，通过计算机仿真分析了浮标接收信号声强比、声纳作用距离以及浮标布放阵形对被动全向浮标LOFIX定位精度的影响，并结合实际应用对仿真结果进行分析验证，结论为：反潜机在布放被动全向浮标时的最优布放间距应该是在1~1.5倍浮标作用距离之间；如果决定采用被动全向浮标LOFIX定位，则应尽量避免将浮标布放成直线阵。这些结论将为反潜机执行搜潜作战任务时，合理选择浮标的布放间隔和布放阵形提供理论依据。

Based on Low Frequency Analysis and Recording Fixing(LOFIX)fixing principle, mathematical models for the LOFIX fixing of passive omnidirectional sonobuoy are set up. Through the computer simulation, the ratio of acoustic intensity of sonobuoy receiving message, the action range of sonars and the effect of distribution array on the LOFIX fixing accuracy of passive omnidirectional sonobuoys are analyzed. Combined with practical application, simulation results are analyzed and tested. The conclusions are: 1) When the anti-submarine airplane distributing passive omnidirectional sonobuoys, the optimum space is between 1~1.5 times of the sonobuoy action ranges; 2) If the LOFIX fixing of passive omnidirectional sonobuoys is intended to be adopted, the sonobuoys should not be distributed in a straight line as far as possible. These conclusions provide the theoretical basis for how to choose the appropriate distribution space and distribution array of sonobuoys when anti-submarine airplanes carry out a searching submarine task.