The changes in the channel’s sands and buoys on this coast a

is a channel's capacity which directly reflects the data transfer rate of the channel.

A．The delay

B．The volume

C．The noise

D．The bandwidth

Shipping articles are contracts of agreement between the members of the crew and the __________.

A.Charterers

B.Coast Guard

C.Master

D.vessel's owner

On either side of York River Entrance Channel, there are areas bounded by short-long magenta lines and marked by yellow buoys. These areas are ______.

A.fish trap areas

B.designated anchorages

C.spoil areas

D.naval exercise areas

A vessel’s position should be plotted using bearings of ______.

A.buoys close at hand

B.fixed known objects on shore

C.buoys at a distance

D.All of above

You are entering an east coast port and see a buoy with a yellow triangle painted on it．This indicates ______．

A.you are in the vicinity of the ICW

B.the buoy is a special mark

C.the buoy is off station

D.the buoy designates a sharp turn in the channel

A.sands...was

B.sand...were

C.sand...was

D.sands...were

A stretch where the channel changes from one side of the river to the other is called a ______.

A.bifurcation

B.transit

C.crossing

D.changeover

Preferred channel buoys indicate the preferred channel to transit by ______.

A.odd or even numbers

B.the color of their top band

C.the location of the buoy in the channel junction

D.the buoy’s light rhythms

材料：

MV Magellan was inbound from Rotterdam to berth 207 at Southampton Container Terminal．At 0530 the pilot boarded the ship at the Nab Tower pilot station．The pilot&39;s and the master&39;s passage plans were exchanged and the ship&39;s pilot card was given to the pilot．

The passage continued along the East Solent，during which time there were various VHF radio conversations between vessels and Southampton VTS，about restricted visibility．The VTS officer gave the pilot a countdown from 5 to 2 cables to the Gurnard buoy．This was given so that the pilot could judge the timing of the wheel-over manoeuvre for the 141° turn into the narrow Thorn Channel．The wheel-over occurred at about 0652 and the ship began to turn．

At this time，the W Bramble and NE Gurnard buoys，which are at the entrance to Thorn Channel，could not be seen because of restricted visibility．Various helm and engine movements were made during the turn．However，when W Bramble and NE Gurnard buoys appeared，the pilot realized that the ship was in the wrong position for the heading she was on．Despite further helm and engine orders，the vessel grounded soon after，at 0700．It was not until about 0710 that the escort harbor launch informed VTS of the grounding．With the assistance of two tugs，the ship was refloated near the time of high water，and she safely berthed at 1232．

问题：

MV Magellan applied wheel at ________ to turn into the narrow Thorn Channel．

A.0530

B.0652

C.0700

D.0710

The important navigational mark or marks at the entrance to the Thorn Channel is（are）________．A.Southampton Container Terminal

B.the East Solent

C.the Nab Tower

D.the W Bramble and NE Gurnard buoys

The suggestion of a countdown from 5 to 2 cables to the Gurnard buoy is ________．A.for the pilot to judge easily when the wheel should be used to make the turn into the narrow Thorn Channel

B.to remind the pilot that the depth around there is not sufficient for MV Magellan

C.to inform the pilot that the visibility around the buoy is reduced further

D.to request the pilot that further consideration should be given to the wheel-over manoeuvre for the 141° turn

It can be concluded that the cause of the grounding was that ________．A.the Bramble and NE Gurnard buoys were disappeared

B.the VHF radio conversations between vessels and Southampton VTS，about restricted visibility，were insufficient and improper

C.Thorn Channel was too narrow

D.there was an error of judgment by the pilot during the execution of the turn into Thorn Channel

请帮忙给出每个问题的正确答案和分析，谢谢！