We do have a satellite navigation system.

我们其实有卫星导航系统。

It will be the fourth global satellite navigation system after GPS, GLONASS and Galileo.

这将是继GPS（美）、格洛纳斯（俄）和伽利略（欧）之后的第四个全球卫星导航系统。

The measurements rely on a variety of survey data, including those from a global satellite navigation system.

这些测量依赖于多种调查数据，包括来自全球卫星导航系统的数据。

We've been at sea for several days and without our satellite navigation system it's hard to know which way we're going.

我们已经在海上待了好几天，没有卫星导航系统，我们很难知道要前往哪条路。

As one of four global satellite navigation systems recognized by the United Nations, BeiDou is used in civil aviation, maritime affairs, search and rescue, and many other fields.

作为联合国认可的全球四大卫星导航系统之一，北斗应用于民航、海事、搜救等诸多领域。