The warship was moving astern following the instructions of the superior.

军舰在按照上级指示向后行驶。

The fishermen put the fish astern together.

渔民把捕捞上来的鱼统一放在了船尾。

The ship was going astern because of the wind and waves.

在风浪的侵袭下，这艘船一直后退。

The boat may be imbalanced by having that weight far astern and may "squat" in the water and not sail as well.

船只可能会因其重量在尾部而变得不平衡，可能会在水里“蹲下”而不能正常航行。

Vessel astern of you anchoring.

在你船后面的船正在抛锚。

We have to move 10metres astern.

我们船必须向后动10米。

Reply: I will pass astern of you.

我将从你船尾通过。

Man overboard on astern.

船尾有人落水。