We selected eight volunteers, all of whom are required to operate rubber assault boats independently.
我们挑选了八名志愿者,他们都能独立操作橡胶突击艇。
英语百科
Assault boat
An Assault boat is a boat utilized by combat soldiers for making a landing as part of combat operations. Meant for inland waters, assault boats were light enough to be carried by several men and paddled, or fitted with an outboard motor for hi-speed operation, manually portable or not.