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There is a vessel ahead()your movement.
A.backup
B.blocking
C.choking
D.obstructing
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There is a vessel carrying()hydrographic survey in the area marked by red lights.
A.on
B.in
C.out
D.with
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There is a vessel in position 120.0E 24.5N on course 120 degrees and speed 12.5 knots()is not complying with traffic regulations.
A.this
B.who
C.which
D.it
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