You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）<br>A:Your speed must be reduced to bare steerage ways<br>B:A look-out is not required if the radar is on<br>C:The radar should always be kept on a short-range scale<br>D:Fog signals are only required when a vessel is detected by radar

You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）
A:Your speed must be reduced to bare steerage ways
B:A look-out is not required if the radar is on
C:The radar should always be kept on a short-range scale
D:Fog signals are only required when a vessel is detected by radar

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