coast defence radar

例句：

1. 1. The coast defence radar is usedto detect underwater objects.
   海岸防御雷达用于探测水下物体。
2. 2. The coastal defense radarhas been upgraded to improve its detectioncapabilities.
   海岸防御雷达已经升级，以提高其探测能力。
3. 3. The coast defence radar isessential for monitoring the ocean's currents and tides.
   海岸防御雷达对于监测海洋的潮流和潮汐至关重要。