A.bearingB.positionC.locationD.placeYour（）is 175°from t……

单项选择题To become an officer on board, you must obtain（）.

A.an officer's license
B.an officer's promotion
C.an officer's statement
D.a seaman's book

单项选择题In a weather report “GMT” stands for（）.

A.Greenwich Mean Time
B.Gross Mean Time
C.Great Mean Time
D.Gross Metric Ton

单项选择题It is danger for vessels without the use of（）to approach the estuary in such poor visibility.

A.Loran C
B.Direction Finder
C.Gyro- compass
D.Radar

单项选择题When visibility is 20 nautical miles, we say that visibility is（）.

A.very good
B.good
C.poor
D.moderate

单项选择题Our ship has not been to shipyard for a long time, the fouling on the ship’s hull greatly decreases her（）.

A.resistance
B.weight
C.speed
D.displacement