We can n ' t get result on how to change course and speed to make collision avoidance , this can help little on collision avoidance decision . the article aims at the default on radar simulator and implements the standard result on radar simulator by making use of mcu . the main production is below : first , we calculate how to chang course and speed on the destine point by mcu . we get the new course and new speed on the destine point , we get the point to resume original course and speed , we get the distance and azimuth to resume original course and speed on given course and speed , the six essential : dcpa , tcpa , distance , azimuth , real speed and real course 本论文针对当前雷达模拟器标绘训练中的不足，实现了利用单片机进行雷达模拟器标绘标准值的计算，主要成果有以下方面：首先，利用单片机计算得到了在预定点改变航向和改变航速的计算，求得预定点改向的新航向c _ n和预定点变速的新速度v _ n ，恢复原航向和原航速的时机点的计算；在给定避碰的新航向、航速的条件下，计算出恢复原航向航速的时机点h的距离r _ h和方位_ h ；目标船的六要素，即dcpa 、 tcpa 、距离r ( t ) 、方位( t ) 、真航速v _ t和真航向c _ t 。
