问题：
[单选题]When navigating in thick fog with the radar on，you should（）.
A、station the look-out in the wheelhouse to keep a continuous watch on the radar
B、secure the sounding of fog signals until a vessel closes within five miles
C、station a look-out as low down and far forward as possible
D、keep the radar on the shortest available range for early detection of approaching vessel
参考答案：
C
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