47.the full astern of the telegraph is much later , pay attention.

注意，全速倒车来的慢。

I shall throw him a lifebuoy, inform the engine room, change sailing course, make engine full astern and steer towards him.

我将给他扔一个救生圈，通知机舱，改变航行路线，使发动机全速倒转并朝他驶去。