sonar thumper unit

例句：

1. 1.The sonar thumper unit was used to detect underwater objects.
   声纳锤式单元被用来探测水下物体。
2. 2. The sonar thumper unit was crucial in the search for the missing diver.
   声纳锤式单元在寻找失踪潜水员的搜索中至关重要。
3. 3. The sonar thumper unit helped the team to navigate through the treacherous waters.
   声纳锤式单元帮助团队穿越险恶的水域。