A.depths in Malacca and Singapore Straits are stable
B.depths in Malacca and Singapore Straits are changeable
C.depths in Malacca and Singapore Straits are invariable
D.depths in Malacca and Singapore Straits are the same all the time
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A.totally enclosed
B.glass-reinforced plastic
C.self-righting
D.powered
A.a draft
B.a freeboard
C.an air draft
D.an under-keel clearance
A.supplied with
B.equipped with
C.manned with
D.fitted with
A.stop engines
B.hold course and speed
C.alter course to port
D.sound the danger signal
A.Tidal Current Tables
B.Tide Tables
C.Publications from CCS
D.Sailing Directions
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In the Northern hemisphere northerly winds may cause temperature（）.
Berthing means bringing a vessel to her berth until（）.
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The circulation around a low pressure center in the Northern Hemisphere is（）.
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
It is dangerous for vessels without the operational radar（）the estuary.