单项选择题
The general benefit of the GMDSS is to（）.
A.enable SAR operations to start with minimum delay B.give facilities to marine communication C.reduce sharply the chances of ship’s sinking D.both A and C
单项选择题 By using previous communication system, rescue is often a matter of chance. What does “a matter of chance” mean?（）
单项选择题 We（）a sharp lookout while sailing in the iced waters.
单项选择题 When a mis-entry（）in the logbook, a red line would be drawn through that part.
