The theory of north finding is first introduced, and the measuring method of north azimuth is brought forward according to a fast north finding theory based on analysis method;

文中首先介绍了寻北系统的工作原理，根据基于解析方法的快速寻北原理，提出了北向方位角的测量方法；

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And there is also an azimuth thruster that can be swung down from the forward part of the hull if an extra push is required.

ECONOMIST: Marine technology: A voyage of discovery | The