There is an ARPA radar on either side.
驾驶台两侧各有一个ARPA雷达。
The invention of ARPA radar resulted in a fundamental change in the study of geometrical collision avoidance, which turned automatic collision avoidance into reality.
ARPA 雷达的出现为几何避碰的研究带来质的变化，使得实现船舶自动避碰成为可能。
However, due to the inherent defects of radar, ARPA cannot provide the precise data which is necessary for automatic collision avoidance.
然而，由于雷达固有的缺陷，ARPA系统并不能提供自动避碰所需的准确信息，从而制约了自动避碰系统的实际应用。
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