vessel towing a submerged object
dredge underway and dredging
hydrographic survey vessel at anchor and surveying
None of the above
第1题：
A vessel towing a barge astern would show，at the stern ______.
A.only a stern light
B.a towing light above the stern light
C.two towing lights in a vertical line
D.two white lights in a vertical line
第2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3题：
A vessel aground would show the same dayshape as a ______.
A.vessel towing a submerged object
B.dredge underway and dredging
C.hydrographic survey vessel at anchor and surveying
D.None of the above
第4题：
Permalloyed
Destroyed
Deployed
employed
第5题：
This reading is at the same elevation as the 6.2 ft. mark on the gage at Head of Passes
A vessel drawing 8 ft would be able to pass over the sill at Old River Lock
This reading is 6.4 feet below the Low Water Reference Plane
A vessel drawing 7 ft. would be able to pass through the locks at Lower Old River
第6题：
A vessel aground may have negative GM since the ______.
A.decrease in KM is equal to the loss of draft
B.virtual rise of G is directly proportional to the remaining draft
C.lost buoyancy method is used to calculate KM, and KB is reduced
D.displacement lost acts at the point where the ship is aground
第7题：
During the day，she would display three balls in a vertical line
If making way，she would show masthead lights at night
If at anchor，she need not show anchor lights while displaying identifying lights
Her fog signal would consist of a rapid ringing of a bell for five seconds every minute
第8题：
A vessel is carrying three lights in a vertical line. The highest and lowest of these are red and the middle light is white. Which statement is always TRUE?
A.During the day，she would display three balls in a vertical line
B.If making way，she would show masthead lights at night
C.If at anchor，she need not show anchor lights while displaying identifying lights
D.Her fog signal would consist of a rapid ringing of a bell for five seconds every minute
第9题：
only a stern light
a towing light above the stern light
two towing lights in a vertical line
two white lights in a vertical line
第10题：
stand-on vessel
privileged vessel
burdened vessel
hampered vessel