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单选题
For a floating vessel，true mean draft is always the（）.
A
average of the observed drafts
B
draft at the center of flotation
C
draft corresponding to the calculated displacement
D
mean of the calculated drafts
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考题
In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to ().A.heel until the angle of loll is reachedB.list until the center of buoyancy is aligned vertically with the center of gravityC.trim to the side opposite TCG until all moments are equalD.decrease draft at the center of flotation
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A vessel transferring cargo while underway is classified by the Rules as a vessel ______.A.restricted in her ability to maneuverB.in special circumstancesC.not under commandD.constrained by her draft
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You are on a 165-foot (50.3 meters) long vessel with a draft of 9 feet (2.7 meters) and twin screws. Which statement about rescuing a survivor in the water with ship pickup is TRUE?A.You should stop to windward of the man and drift down on himB.You should stop with the man on your weather beam and twist the ship up to himC.A pickup off the weather bow gives maximum maneuverability with the least possibility of injury to the manD.Ship pick up should never be used with a shallow draft vessel
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You are on a 50.3 meters long vessel with a draft of 2.7 meters and twin screws．Which statement about rescuing a survivor in the water with ship pickup is TRUE ________．A.You should stop to windward of the man and drift down on himB.You should stop with the man on your weather beam and twist the ship up to himC.A pickup off the weather bow gives maximum maneuverability with the least possibility of injury to the manD.Ship pick up should never be used with a shallow draft vessel
考题
______is the number of millimeters by which the mean draft changes when a ship passes from salt water to fresh water，or vice versa，whilst floating at the loaded draft．A.TPCB.The Fresh Water AllowanceC.Parallel sinking of the shipD.UKC
考题
A vessel restricted by its ability to manoeuvre by the nature of its work or its deep draft is__A.Hampered vesselB.Giving way vesselC.Vessel not under controlD.Disabled vessel
考题
For a floating vessel, the center of flotation is the point in the waterplane ______.A.about which the vessel lists and trimsB.which coincides with the center of buoyancyC.which, in the absence of external forces, is always vertically aligned with the center of gravityD.which is shown in the hydrostatic tables as VCB
考题
For a floating vessel, true mean draft is always the ______.A.average of the observed draftsB.draft at the center of flotationC.draft corresponding to the calculated displacementD.mean of the calculated drafts
考题
单选题You are on a 165-foot (50.3 meters) long vessel with a draft of 9 feet (2.7 meters) and twin screws. Which statement about rescuing a survivor in the water with ship pickup is TRUE? （）A
You should stop to windward of the man and drift down on himB
You should stop with the man on your weather beam and twist the ship up to himC
A pickup off the weather bow gives maximum maneuverability with the least possibility of injury to the manD
Ship pick up should never be used with a shallow draft vessel
考题
单选题What determines if a vessel is restricted in her ability to maneuver?（）.A
Whether or not all of the vessel's control equipment is in working orderB
The vessel's draft in relation to the available depth of waterC
Whether the nature of the vessel's work limits maneuverability required by the RulesD
Whether or not the vessel is the give-way vessel in a meeting situation
考题
单选题When a vessel is inclined by an external force，the（）.A
shape of the vessel's underwater hull remains the sameB
vessel's center of gravity shifts to the center of the vessel's underwater hullC
vessel's center of buoyancy shifts to the center of the vessel's underwater hullD
vessel's mean draft increases
考题
单选题A vessel transferring cargo while underway is classified by the Rules as a vessel（）.A
restricted in her ability to maneuverB
in special circumstancesC
not under commandD
constrained by her draft
考题
单选题The mean draft of a ship is the draft（）.A
midway between the forward and aft draft marksB
at the center of flotationC
at the load lineD
at the center of buoyancy
考题
单选题How do you determine the weight of the vessel that is supported by the ground when a vessel has run aground?（）A
This requires extensive calculation and is usually performed only by a naval architect not by a ship's officerB
Determine the point where aground and the draft at that point，then calculate it using the grounding formulaC
Use the hydrostatic tables and enter with the mean draft before grounding and the mean draft after groundingD
Use the inclining experiment formula and substitute the change of trim for the angle of list
考题
单选题Which of the following statements is TRUE regarding automatic identification systems (AIS) ?（）A
The master may，at his/her discretion，turn off the AIS if he/she believes that it may compromise the safety or security of the vesselB
Under no circumstances shall AIS be turned off while underway as this could endanger the vessel and those around herC
AIS is always required to be operating if the vessel is in or in the vicinity of a VTS areaD
AIS is always required to be operating if the vessel is within 100 nautical miles of the coastline
考题
单选题The lubber’s line of a magnetic compass（）.A
always shows true north directionB
indicates the vessel's headingC
is always parallel to the vessel's transomD
is located on the compass card
考题
单选题What does salt water draft mean?（）.A
It means summer draftB
It means maximum draftC
It means fresh water draftD
It means seawater draft
考题
单选题The center of the underwater volume of a floating vessel is the（）.A
center of buoyancyB
center of flotationC
uncorrected height of the center of gravity of the vesselD
center of gravity of the vessel corrected for free surface effects
考题
单选题When navigating a vessel，you（）.A
can always rely on a buoy to be on stationB
can always rely on a buoy to show proper light characteristicsC
should assume a wreck buoy is directly over the wreckD
should never rely on a floating aid to maintain its exact position
考题
单选题If the metacenteroic height is small,a floating vessel will（）.A
be tenderB
have a quick and easy motionC
be stiffD
yaw
考题
单选题Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?（）.A
The metacenter does not remain in the same position for large angles of inclinationB
The center of gravity shifts due to inclinationC
The center of gravity shifts above the metacenter as the vessel is inclinedD
The mean draft will change as the vessel is inclined
考题
单选题A vessel constrained by her draft shall, when she overtakes a sailing vessel in a fairway,the sailing vessel is（）.A
priviledged vessel and keep her course and speedB
burdened vessel and give way to othersC
burdened vessel and keep course nad speedD
priviledged vessel and give way to others
考题
单选题For a floating vessel,true mean draft is always the（）.A
average of the observed draftsB
draft at the centre of flotationC
draft corresponding to the center of buoyancyD
metacentric height
考题
单选题In the absence of external forces，adding weight on one side of a floating vessel causes the vessel to（）.A
heel until the angle of loll is reachedB
list until the center of buoyancy is aligned vertically with the center of gravityC
trim to the side opposite TCG until all moments are equalD
decrease draft at the center of flotation
考题
单选题For a floating vessel，the center of flotation is the point in the waterplane（）.A
about which the vessel lists and trimsB
which coincides with the center of buoyancyC
which，in the absence of external forces，is always vertically aligned with the center of gravityD
which is shown in the hydrostatic tables as VCB
考题
单选题For a floating vessel,the center of the floating is the point in the waterpiane.（）.A
aboat which the vessel lists and trimsB
which coincides with the center of buoyancyC
which, in the absence of external forces, is always vertically aligned with the center of gravityD
which is shown in the hydrostatic tables as VCB
考题
单选题Which statement is TRUE，according to the Rules（）.A
A vessel not under command shall keep out of the way of a vessel restricted in her ability to maneuverB
A vessel not under command shall avoid impeding the safe passage of a vessel constrained by her draftC
A vessel constrained by her draft shall keep out of the way of a vessel engaged in fishingD
A vessel engaged in fishing while underway shall，so far as possible，keep out of the way of a vessel restricted in her ability to maneuver
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