单项选择题
A.cross the channel as you are the stand-on vessel
B.cross only if the vessel in the channel is approaching on your port side
C.not cross the channel if you might impede the other vessel
D.sound the danger signal
单项选择题 Between April and November, squalls（）as Sumateras（）in Malacca Strait in the late afternoon or overnight and（）E to affect the W coast of Malaysia and Singapore Island.
单项选择题 You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）
单项选择题 Who can suggest changes to the SMS?（）