单项选择题
A.when at anchor B.only when making way C.at any time when underway D.only when the identifying lights are not being shown
A pilot vessel may continue to sound an identity signal...
单项选择题A pilot vessel may continue to sound an identity signal if she is （）.
A.aground B.at anchor C.not under command D.being towed
A pilot chart does NOT contain information about （）.A.a...
单项选择题A pilot chart does NOT contain information about （）.
A.average wind conditions B.tidal currents C.magnetic variation D.average limits of field ice
A petroleum liquid has a flash point of 85°F. This is a...
单项选择题A petroleum liquid has a flash point of 85°F. This is a grade （）.
A.B flammable liquid B.C flammable liquid C.D combustible liquid D.E combustible liquid
