The officers on watch rushed to the craft's stern. They examined the ocean with the most scrupulous care.

船上值班的海员们立即跑到船的后部；他们十分细心地观察海面。

21. Under what conditions should you as officer on watch change the ship's speed?

21. 作为值班高级船员，在什么情况下应改变船舶航速？

Usually, under the following situations, the turnover can be deferred or even postponed: (1) If the officer on watch has reason to believe that the relieving officer is obviously not able to carry out his duties effectively?

通常，在下列情况下，交接工作可以延期甚至延期： （1）值班人员有理由相信接替人员明显不能有效履行职责？