A.When dead in the water，it is often difficult to find the neutral position and slight headway or sternway may result
B.When going directly from full ahead to full astern，there is complete steering control
C.When the vessel has headway and the propeller is in neutral，there is no effect on rudder control
D.When maneuvering in port，full ahead or astern power can usually be obtained without changing shaft RPM
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A.annular blowout preventer
B.annulus
C.accumulator
D.automatic choke
A.flame arrestor
B.flame screen
C.detonation arrestor
D.detonation blocker
A.slipway
B.graving dock
C.ground warp
D.caisson dock
A.a 2-second blast every 20 seconds
B.a 4-second blast every 20 seconds
C.an 8-second blast every 30 seconds
D.a 10-second blast every 30 seconds
A.turn off all lights that interfere with the navigation lights
B.turn on all available working lights on deck
C.ring the bell rapidly for five seconds once a minute
D.display two black diamonds in a vertical line during the day
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All ships（）suspected infectious disease on board should radio information to Port Health Officer.
Between 1830 hrs and 1850 hrs this day，strong gusty winds（）by my vessel，in consequence of which the vessel’s four mooring lines were broken.
It is not necessary to declare（）in the Health List.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
A flooded leg on a liftboat would adversely affect the vessel’s stability underway by（）.
A hand held instrument used to measure distances between objects and the ship is a（）.
An inert gas system installed on a tanker is designed to（）.
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.
An obstruction on a helodeck is any object that might present a hazard to the（）.
For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of（）.