航向的英文：
course

The plane was on/off course, ie following/not following the right course.
飞机航向正确[偏离航向

course corrected for leeway
修正风压差的航向

The captain ordered a change of tack.
船长下令改变航向。

On the bottom is the heading indicator.
底部是航向指示器。

course scalloping
【航空】航向扇贝形现象

The helmsman could tack the boat singlehanded.
舵手独自一人就能变换航向。

They're vectoring away.
他们改变航向离开了。

The destroyer was turning to a collision course
驱逐舰改为迎面开来的航向。

Our rowboat's course was erratic after we lost the oars.
丢了桨之后我们划艇的航向飘忽不定。

The helmsman brought the ship about and headed for safety
舵手改变船的航向，驶向安全地带。

a bobsleigh course
大雪橇滑道

It is not, of course, exhaustive
当然这是不够详尽的。

In college, English is a required course and psychology is an elective course.
在大学里，英语是必修课而心理学是选修课。

The checks are all good, of course.
当然，这些支票是完全有效的。

Of course, this can be abused.
当然了，这样还是可能会被滥用。