The errors of the estimated DCPA and the sources of errors are analysed. This article provides reference for the officers in avoiding manoeuvring and also provides for the simulator teaching.

• 分析了估算得到的DCPA值的误差及误差来源；可为船舶驾驶员海上实施避让操纵提供参考；亦可为学校模拟器教学提供参考.