单项选择题
（）will normally provide sufficient information to seaward of fairway buoy or pilot station.
A.Navarea warnings B.coastal warnings C.local warnings D.Meteorological warnings
单项选择题 MSI stands for（）.
单项选择题 The FEC mode is for（）from（）station to two or more other stations when available.
单项选择题 The SART should have sufficient battery capacity to operate in the stand-by condition for（）hours and should continuously work for（）hours.
