A.Wave length
B.Wave height
C.Wave breadth
D.wave depth
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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
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
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