The captain ______ this salvage contract as the representative of the owners of vessel and
A. writes down
B. enters into
C. takes note
D. works off
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A vessel towing astern in an operation which severely restricts the towing vessel and her
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
A vessel may use any sound or light signals to attract the attention of another vessel as
A. white lights are not used
B. red and green lights are not used
C. the signal cannot be mistaken for a signal authorized by the Rules
D. the vessel signals such intentions over the radiotelephone
A vessel hearing a fog signal forward of her beam has not determined if risk of collision
A. moderate speed
B. safe speed
C. half speed
D. bare steerageway
A vessel is carrying three lights in a vertical line. The highest and lowest of these are
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
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