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单选题
In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.
A
insure that the hawser leads directly aft as it passes over the stern of the towing vessel
B
increase the stability of the towing vessel by raising the hawser off the deck
C
reduce chafing of the towing hawser
D
prevent fouling of the hawser on deck gear located on the stern of the towing vessel
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更多 “单选题In astern towing，a tow span，also called the tow bar or towing arch，is used to（）.A insure that the hawser leads directly aft as it passes over the stern of the towing vesselB increase the stability of the towing vessel by raising the hawser off the deckC reduce chafing of the towing hawserD prevent fouling of the hawser on deck gear located on the stern of the towing vessel” 相关考题
考题
A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a ______.A.main braceB.tow spanC.jockey barD.None of the above
考题
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
考题
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
考题
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
考题
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
考题
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
考题
单选题The biggest problem you generally encounter while towing a single tow astern is（）.A
the catenary dragging on the bottomB
swamping of the towC
the tow tending to diveD
yaw
考题
单选题You see a vessel carrying a black diamond which indicates a（）.A
vessel towing asternB
barge pushed aheadC
vessel towing astern only when the length of her tow exceeds 200 metersD
this signal does not exist in international waters
考题
单选题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
考题
单选题What is the purpose of the intermediate spring?（）A
Serves as a backup for the main tow hawser in case of failureB
Provides weight and flexibility to the total tow makeupC
Lengthens the main tow hawser to keep the tow in stepD
Distributes the towing load
考题
单选题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
考题
单选题A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.A
three masthead lights in a vertical line instead of either the forward or after masthead lightB
two masthead lights in a vertical line instead of either the forward or after masthead lightsC
two towing lights in a vertical line at the sternD
a small white light aft of the funnel
考题
单选题When towing astern，one way to reduce yawing of the tow is to（）.A
trim the tow by the sternB
trim the tow by the headC
have the tow on an even keelD
list the tow on the side it is yawing
考题
单选题You have been towing astern and have just let go the tow.Your deckhands are pulling in and faking the towline by hand on the stern.The most dangerous action to take is to（）.A
continue ahead at slow speedB
continue ahead at half speedC
stop your enginesD
back down on your engines
考题
单选题In towing，heaving lines are used for（）.A
passing a tow bridle to the tugB
passing a messenger lineC
heaving in the tow bridleD
service lines with rocket line throwers
考题
单选题Which will NOT reduce yawing of a tow?（）A
Increasing the length of the towing hawserB
Trimming the tow by the bowC
Trimming the tow by the sternD
Drogues put over the stern
考题
单选题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
考题
单选题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，sternlight and towing lightD
All of the above
考题
单选题When steering a tow downstream around the shape of a sand bar，and staying on the proper side of the buoys，an operator should be cautious of（）.A
eddies under the barB
swift current under the bar causing loss of controlC
cross-currents pushing the tow away from the barD
cross-currents pushing the tow into the bar
考题
单选题In towing it is desirable for the tug and the vessel to ride wave crests simultaneously because（）.A
shock loading on the tow line is reduceB
towing speed is improvedC
the vessel is more visible from the tugD
the catenary of the tow line is reduced
考题
单选题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
考题
单选题If the towline parts，you should（）.A
start towing by pushing aheadB
abandon the towing vesselC
retrieve the tow bridleD
relieve strain on the retrieving line
考题
单选题A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.A
tow strainB
catenary lengthC
being in stepD
Williamson's Tow
考题
单选题When towing in an open seaway，it is important to use a towing line（）.A
made only of wire rope，due to possible weather conditionsB
that will have the tow on a crest while your vessel is in a troughC
that will have the tow on a crest while your vessel is on a crestD
with little dip to gain maximum control of the tow
考题
单选题To reduce stress on the towing hawser when towing astern (ocean tow)，the hawser should be （）.A
secured to the aftermost fitting on the towing vesselB
just touching the waterC
underwaterD
as short as possible
考题
单选题If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights. These additional lights may be shown if the tow is（）.A
pushed aheadB
towed alongsideC
towed asternD
Any of the above
考题
单选题As seen from the tow，what should connect the leading ends of both towing bridle legs to the main towing hawser?（）A
A cable clampB
A fishplate，flounder，or towing plateC
A pad eyeD
The towing bitts
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