单项选择题
Normally the mariners care more about the（）of tide.
A.speed
B.height
C.direction
D.course
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相关考题
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单项选择题
The International Association of Lighthouse authorities (IALA) buoyage system “A” uses some types of marks to distinguish safe navigation? Which type(s) does(do) not belong to the system?（）
A.lateral marks and cardinal marks
B.safe water marks
C.isolated danger marks and special marks
D.dangerous water marks -
单项选择题
Which refers to the living space for seafarers?（）
A.Poop
B.Store room
C.Accommodation
D.Saloon -
单项选择题
（）cargoes in IMSBC code are those that are likely to liquefy.
A.Group A
B.Group B
C.Group C
D.Group D
