Also, water scooter operators have been killed and seriously injured in collisions with other watercraft.

另外，水上摩托驾驶者们在与另一辆相撞时非死即伤。

They can also learn how to use watercraft, such as canoes, kayaks and paddleboards.

他们还可以学习如何使用船艇，如独木舟、皮划艇和冲浪板。

So this could be the first sighting of the watercraft.

所以这可能是第一次看到船只。

With these materials I should be able to make a motorized watercraft with a hundred nautical mile range.

有了这些材料，我应该能够制造出航程一百海里的机动船只。

So the watercraft can save the weight of heavy lighting equipment and you don't need extensive training or a wetsuit to operate it.

因此，使用这款潜水器不用搭载沉重的照明设备，操作之前也不需要大量的训练或装备潜水服。

They found that the number of watercraft collisions increased " significantly" over time from one to four per year in the late 1990s and early 2000s to 10 to 17 per year by the late 2010s.

他们发现，随着时间的推移，船只碰撞的海牛数量“显著”增加，从 20 世纪 90 年代末和 21 世纪初的每年 1 到 4 起，到 2010 年代末的每年 10 到 17 起。