A tug may be in danger of tripping when ______.
A.towed sideways by an overwhelming force on the towline
B.her tow moves parallel to and forward on either side of the tug
C.the tow is no longer directly astern but moves up on her quarter
D.All of the above
第1题:
For a floating vessel, the center of buoyancy and the metacenter are in the line of action of the buoyant force ______.
A.only when there is positive stability
B.only when there is negative stability
C.only when there is neutral stability
D.at all times
第2题:
第3题:
one target
two targets
three targets
a large number of targets
第4题:
only when there is positive stability
only when there is negative stability
only when there is neutral stability
at all times
第5题:
acts as a reserve length of towing hawser when the tug applies more power,and it dampens the surge effect of the tow
gives an approximation of the amount of strain on the towing hawser
is the dip in the towing hawser between the tug and the tow
All of the above
第6题:
from the ship's propeller when making up aft
from being overrun if making up forward
hull damage while alongside passing a hawser
getting in a tripping position
第7题:
The catenary in a hawser should be sufficient so that the hawser just touches the bottom
The hawser is of sufficient length for towing when taut between tug and tow
Increasing speed usually increases the catenary in the hawser
Shortening the tow hawser generally decreases the maneuverability of the tug
第8题:
it is overtaken by the tow
it is pulled sideways by the tow
the weight of the towing hawser causes loss of maneuverability
the propeller is fouled by the towing hawser
第9题:
shorten the hawser or increase the tug's speed
lengthen the hawser or reduce the tug's speed
place your tug in irons
make a sharp turn
第10题:
towed sideways by an overwhelming force on the towline
her tow moves parallel to and forward on either side of the tug
the tow is no longer directly astern but moves up on her quarter
All of the above
第11题:
The job will need to be reenabled before it will execute again.
The job may hold locks on objects referenced within it.
All jobs within the job group will also be stopped.
The job may leave data in an inconsistent state.
There is no danger in using the STOP_JOB procedure.
第12题:
metacentric height
righting arm
righting moment
metacentric radius
第13题:
第14题:
The low may suddenly deepen,and the cyclone intensify and pick up speed
The left semicircle may become the dangerous semicircle
The low and the high may merge and cancel out the weather characteristics of each
The high may force the cyclone to reverse its track
第15题:
there are other vessels in the vicinity
operating in a traffic separation scheme
engaged in a situation involving more than two vessels
necessary to avoid immediate danger
第16题:
Texas deck
water table
stabbing board
monkey board
第17题:
The further forward and closer to amidships the more readily the tug will trip
Placement further aft permits more effective pulling,better steering and eliminates the danger of tripping
Installing the bitts down low lowers the center of gravity
The height and position of towing bitts has no significance
第18题:
When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signal
Only the stand-on vessel can sound the danger signal
Distress signals may be used in place of the danger signal
The danger signal consists of 4 or more short blasts of the whistle
第19题:
Throttles up and down to counteract the buffeting from air molecules.
Feels the subtle variations in Earth’s tug.
Helps accelerometers surive the launch
Provides powerful force to counteract the drag on Goce.
第20题:
heaving line
shot line
high line
messenger line
第21题:
decelerating when lowering the load
decelerating when raising the load
lowering the load at constant speed
raising the load at constant speed
第22题:
only when there is positive stability
only when there is negative stability
only when there is neutral stability
at all times
第23题:
there are no other vessels around
operating in a narrow channel
the Master enters it in the ship's log
necessary to avoid immediate danger