A.prevent the boom from being raised too high
B.prevent the boom from swinging
C.support the boom when not in use
D.prevent the boom from being lowered
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A.the three month period immediately following the certificate's anniversary date
B.the three month period immediately preceding the certificate's anniversary date
C.three months either way of the certificate's anniversary date
D.the three month period centered on the certificate's anniversary date
A.holding angle
B.fleet angle
C.fluke angle
D.shank angle
A.burial angle
B.penetration angle
C.fluke angle
D.holding angle
A.bower anchors
B.kedge anchors
C.spare anchors
D.stream anchors
A.relayed
B.delayed
C.conveyed
D.surveyed
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The end of the joint with the exterior threads is called the（）.
The annual survey for endorsement of a Load Line Certificate must be held within（）.
Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
Cracks may be prevented from developing at the corners of welded plating inserts by（）.
In order to withstand fluid head pressure on a ship，stiffeners are often attached to the bulkhead（）.
The boom stops are installed on an offshore crane to（）.
In the ship construction portfolio，materials which do not conform to ASTM or ABS specifications must also include the（）.
The anchors on the bow are known as（）.
The document on a vessel，annually endorsed by an American Bureau of Shipping surveyor，is called the（）.
Chafing gear（）.