The pentagon showed off the world's largest unmanned surface vessel.

五角大楼展示世界上最大无人水面舰艇。

Of course, the PLA navy has a huge number of submarines and surface vessels.

当然，解放军海军拥有数量庞大的潜艇和水面舰艇。

The search involving aircraft and surface vessels was intensifying about 900 miles east of Cape Cod near the site of the Titanic wreckage.

在科德角（Cape Cod）以东 900 英里处，靠近泰坦尼克号残骸所在地的地方，飞机和水面舰艇的搜索力度正在加大。

The battery-operated WasteShark is an autonomous surface vessel, designed to remove algae, biomass and floating pollution such as plastics from lakes, ponds and other coastal waterways.

电池操作的WasteShark是一款自动化水面船只，用于清除湖泊、池塘和其他沿海水道中的藻类、生物质和塑料等漂浮污染。

In June, Britain's defence ministry awarded an urgent contract to BAE Systems, another armaments company, for an aerial-reconnaissance drone to deploy aboard frigates " to counter unmanned surface vessels" .

6 月，英国国防部与另一家军备公司 BAE Systems 签订了一份紧急合同，要求其将一架空中侦察无人机部署在护卫舰上， “以对抗无人水面舰艇” 。

Uncrewed surface vessels thus seem poised to follow the trajectory of airborne commercial drones, which caught governments flat-footed when they went from hobby-shop curiosity to deadly security threat seemingly overnight.

因此，无人驾驶的水面舰艇似乎准备跟随空中商用无人机的轨迹，当它们似乎在一夜之间从业余爱好商店的好奇心变成致命的安全威胁时，这些无人机让政府措手不及。