A.a lock that is open B.a sunken barge C.a dolphin，water intake and discharge D.the end of a wharf
A.Cleaner B.Effective on metal fires C.Greater range D.More cooling effect
A.navigate as close to the left descending bank as safety permits B.navigate as close to the right descending bank as safety permits C.turn into the inflow channel as the bypass is now open D.slow your engine speed to not more than 5 mph
A.shallow water B.an engine that is misfiring C.a tight tail shaft gland D.worn stern bearing or misalignment
A.weather vane，wind vane or wind sock B.hydrometer C.hygrometer D.sling psychrometer
A.an interrupted quick flashing buoy B.Hog Island Lighted Bell Buoy C.South Light Buoy D.Sand Shoal Inlet Lighted Buoy "A"
A.absolute humidity decreases B.relative humidity increases C.specific humidity decreases D.dew point rises
A.owner B.agent C.Master D.All of the above
A.bow to the wind B.beam to the wind C.stern to the wind D.with the wind on the quarter
A.Masthead lights and sidelights B.One sidelight，the masthead lights and stern light C.Both sidelights D.Stern light
