单项选择题
A.at high vessel speeds B.at low vessel speeds C.in shallow water D.in deep water
When compared to air temperature,which factor is most u...
单项选择题When compared to air temperature,which factor is most useful in predicting fog?（）
A.Vapor pressure B.Dew point C.Barometric pressure D.Absolute humidity
Radiation fog is more commonly encountered in（）.A.sprin...
单项选择题Radiation fog is more commonly encountered in（）.
A.spring B.later winter C.autumn D.end of summer
Maintenance of charts and nautical publications up to d...
单项选择题Maintenance of charts and nautical publications up to date is a statutory requirement under the（）Convention.
A.STCW B.MARPOL C.SOLAS D.ISM
