单选题A 200-meter vessel is aground in fog. Which signal is optional? （）A A bell signalB A gong signalC A whistle signalD All of the above

A vessel aground would show the same dayshape as a ______.

A.vessel towing a submerged object

B.dredge underway and dredging

C.hydrographic survey vessel at anchor and surveying

D.None of the above

Which statement concerning satellite EPIRBs is TRUE ________．

A.Once activated，these EPIRBs continuously send up a signal for use in identifying the vessel and for determining the position of the beacon

B.The coded signal identifies the nature of the distress situation

C.The coded signal only identifies the vessel's name and port of registry

D.If the GMDSS Radio Operator does not program the EPIRB，it will transmit default information such as the follow-on communications frequency and mode

In a narrow channel or fairway when overtaking can take place only if the vessel to be over-taken has to take action to permit safe passing， the vessel intending to overtake shall indicate her intention by sounding appropriate signal． This means that ________ ．

A.the vessel to be overtaken shall sound appropriate signal first

B.the overtaking vessel shall sound appropriate signal first

C.the overtaking vessel shall take action to permit safe passing

D.the vessel to be overtaken shall take action to permit safe passing before hearing appropriate signal

Concerning the identification signal for a pilot vessel, in fog, which statement is TRUE?___.

A.When at anchor, the pilot vessel is only required to sound anchor signals

B.The identification signal must be sounded any time the pilot vessel is underway

C.The pilot vessel may only sound the identity signal when making way

D.All of the above

A vessel may use any sound or light signals to attract the attention of another vessel as long as ______.

A.white lights are not used

B.red and green lights are not used

C.the signal cannot be mistaken for a signal authorized by the Rules

D.the vessel signals such intentions over the radiotelephone

A vessel aground may have negative GM since the ______.

A.decrease in KM is equal to the loss of draft

B.virtual rise of G is directly proportional to the remaining draft

C.lost buoyancy method is used to calculate KM, and KB is reduced

D.displacement lost acts at the point where the ship is aground

You are on international waters during a heavy rainstorm and hear a vessel sounding a fog signal of one prolonged blast followed by two short blasts． Which of the following could it be？Ⅰ．A vessel laying submarine cable making way．Ⅱ．A pilot vessel on station at anchor．

A.Ⅰ only

B.Ⅱ only

C.Either Ⅰ or Ⅱ

D.Neither Ⅰ nor Ⅱ

In a narrow channel, a signal of intent which must be answered by the other vessel, is sounded by a vessel ______.

A.meeting another head-on

B.overtaking another

C.Any of the above

D.crossing the course of another