Hovering: a helicopter hovers above the Montecristo during the operation to free the vessel in the Indian ocean.
盘旋：在印度洋救援货船行动期间，一架直升机盘旋在“蒙特·克里斯托”号上空。
2
Mark a master chief petty officer and the ranking noncommissioned officer on the operation crouched on one knee beside the open door of the lead helicopter.
一级军士长、此次任务未授衔负责人Mark单膝跪在领头直升机打开的门侧。
3
The method presented in this paper may be used for reference to the people who work on the armed helicopter design and operation.