the masthead lights for a towing vessel
the lights for a vessel restricted in her ability to maneuver
sidelights，stern light，and towing light
All of the above
第1题：
A vessel is considered to be "restricted in her ability to maneuver" under the Rules if she is ______.
A.at anchor
B.mineclearing
C.engaged in fishing
D.engaged in towing
第2题：
A vessel engaged in mine clearance operations is called ______.
A.a vessel restricted in her ability to maneuver
B.a vessel not under command
C.a vessel constrained by her draught
D.a vessel not under way
第3题：
A mobile offshore drilling unit under tow is approaching a fog bank. When should fog signals be started?
A.When the towing vessel enters the fog
B.When the drilling rig enters the fog
C.When the towing vessel can no longer be seen from the rig
D.Immediately
第4题：
When the towing vessel enters the fog
When the drilling rig enters the fog
When the towing vessel can no longer be seen from the rig
Immediately
第5题：
If practical, when shall a manned vessel being towed sound her fog signal?______.
A.Immediately before the towing vessel sounds hers
B.Immediately after the towing vessel sounds hers.
C.As close to the mid-cycle of the towing vessel’s signals as possible
D.At any time as long as the interval is correct
第6题：
A vessel towing astern in an operation which severely restricts the towing vessel and her tow in their ability to change course shall，when making way，exhibit ______.
A.the masthead lights for a towing vessel
B.the lights for a vessel restricted in its ability to maneuver
C.sidelights，stern light and towing light
D.All of the above
第7题：
An ocean tow is sinking in deep water. Attempts to sever the towing hawser are unsuccessful Which action should now be taken?______.
A.Abandon the towing vessel.
B.Radio for emergency assistance.
C.Slip the towline and allow it to run off the drum.
D.Secure all watertight openings on the towing vessel.
第8题：
A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when ______.
A.directly astern and pushing the tow
B.towing on a hawser
C.towing alongside and parallel to the vessel it is towing
D.towing on the hip
第9题：
By day，she shall carry a black cylinder shape
By day，she shall carry two black balls in a vertical line
By night，she would show the same lights as a vessel not under command
By day，she would show the same shapes as a vessel restricted in her ability to maneuver
第10题：
vessel towing astern
barge pushed ahead
vessel towing astern only when the length of her tow exceeds 200 meters
this signal does not exist in international waters