A tug is "in irons" when held in a fixed position by ______.A.the weight of its tow，its being anchored，or groundedB.the weight of its towing hawser on the bottomC.an adverse currentD.lack of power or an engine breakdown
A tug is "in irons" when held in a fixed position by ______.
A.the weight of its tow，its being anchored，or grounded
B.the weight of its towing hawser on the bottom
C.an adverse current
D.lack of power or an engine breakdown
相关考题：
A fixed asset impairments occurs when the fair value of a fixed asset falls below its book value and is not expected to recover.()
Before leaving port on an ocean tow，a tug captain should assure himself of all the following EXCEPT ______.A.the towing hawser can be released quickly in an emergencyB.the correct navigation lights are rigged and operable on the tug and towC.an insurance underwriter has prepared a pre-sailing surveyD.a pick-up wire has been rigged on the tow in case of a breakaway.
A tow can override its tug as a result of ______.A.a mechanical breakdown on the tugB.adverse tidal current conditionsC.the tug reducing its speedD.All of the above
A tug may be in danger of tripping when ______.A.towed sideways by an overwhelming force on the towlineB.her tow moves parallel to and forward on either side of the tugC.the tow is no longer directly astern but moves up on her quarterD.All of the above
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 vesselB.the lights for a vessel restricted in its ability to maneuverC.sidelights，stern light and towing lightD.All of the above
With a large tow astern，there is immediate danger to the tug in the event of the ______．A.Tug losing powerB.Tow line partingC.Bridle twistingD.Tow broaching
A tow astern is veering from side to side on its towline．The best way of controlling the action is to ______．A.Trim the tow by the bowB.Trim the tow by the sternC.List the tow to windwardD.Adjust the length of the towing bridle
A chain bridle is used when towing astern because it ______.A.is easy to connectB.provides an effective catenary and absorbs shock due to its weightC.makes rigging a swivel unnecessaryD.prevents the tow from yawing by the drag of the chains in a seaway
How can a SART’s effective range be maximized?______A.The SART should be placed in water immediately upon activation.B.The SART should be held as high as possible.C.Switch the SART into the “high” power position.D.If possible, the SART should be mounted horizontally so that its signal matches that of the searching radar signal.
单选题A tug is “in irons” when held in a fixed position by（）Athe weight of its tow，its being anchored，or groundedBthe weight of its towing hawser on the bottomCan adverse currentDlack of power or an engine breakdown
单选题A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.Areplaced in its proper location if weight loss is no more than 15%Breplaced in its proper location if weight loss is no more than 25%Clabeled empty and recharged as soon as possibleDlabeled empty and replaced in its proper location regardless of weight
单选题A chain bridle is used when towing astern because it（）.Ais easy to connectBprovides an effective catenary and absorbs shock due to its weightCmakes rigging a swivel unnecessaryDprevents the tow from yawing by the drag of the chains in a seaway
单选题When a feature remains in its existing charted position but has a change of characteristic,（）command is used on a chart.AMOVEBDELETECAMENDDSUBSTITUTE
单选题When starting an engine, the compressed air enters the cylinder when the corresponding piston is in position of its（）Asuction strokeBcompression strokeCpower strokeDexhaust stroke
单选题When connecting the tow bridle to a tug, the end of the bridle is passed with a（）.Aheaving lineBshot lineChigh lineDmessenger line
单选题If a vessel under tow starts jumping on its tow line，the most appropriate action to alleviate the condition is to（）.Achange courseBslow downCheave toDadjust tow line length
单选题A tug may be in danger of tripping when（）.Atowed sideways by an overwhelming force on the towlineBher tow moves parallel to and forward on either side of the tugCthe tow is no longer directly astern but moves up on her quarterDAll of the above
单选题In restricted visibility a towed vessel must sound a fog signal when it is（）.Athe last vessel in the towBthe last vessel in the tow and it is carrying a crewCmanned，regardless of its position in the towDNone of the above are correct
单选题Every lifeboat which is fitted with a fixed（）VHF radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.Aone-wayBtwo-wayCdouble-effectDone-effect
单选题Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.AHFBVHFCMFDMF/HF
单选题A tow astern is veering from side to side on its towline. The best way of controlling the action is to（）.Atrim the tow by the bowBtrim the tow by the sternClist the tow to windwardDadjust the length of the towing bridle
单选题The condition where a ship on the end of a tow line is riding a wave crest at the same time as its tug rides a wave crest is known as riding in（）.AsynchronismBharmonyCcheckDstep
单选题A tow can override its tug as a result of（）.Aa mechanical breakdown on the tugBadverse tidal current conditionsCthe tug reducing its speedDAll of the above
单选题The locking pin that joins the parts of a detachable link is held in position by（）.Aa tack weldBthe self-locking characteristics of its taperCa cotter pinDa lead plug
单选题What does the DSC control unit do if the GMDSS radio operator fails to insert updated information when initiating a DSC distress alert?（）AIt will abort the transmission and set off an audible alarm that must be manually resetBIt will initiate the DSC distress alert but，as no information will be transmitted，rescue personnel will not be able to identify the vessel，its position or its situationCIt will initiate the DSC distress alert and default information will automatically be transmittedDIt will initiate the DSC distress alert，but any station receiving it will have to establish contact with the distressed vessel to determine its identity，position and situation