航海英语遇险通信章节练习(2017.12.17)

单项选择题
Which signal is detected as originating from a SART?（）
A.The Morse code distress series S-O-S repeated 3 times followed by DE and the vessel's call sign
B.A line of blip code on a radar screen outward from the SART's position along its line of bearing
C.A line of blip code on a radar screen inward from the SART's position to its own ship along its line of bearing
D.None of these
单项选择题
When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）
A.After determining that the frequency or channel appears to be no longer in use
B.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C.After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D.Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
单项选择题
The Navigation Rules state that a vessel shall be operated at a safe speed at all times so that she can be stopped within（）.
A.the distance of visibility
B.1/2 the distance of visibility
C.a distance appropriate to the existing circumstances and conditions
D.the distance that it would require for the propeller to go from full ahead to full astern
单项选择题
What is NOT a distress signal?（）
A.Red flares or red rockets
B.Continuous sounding of fog signaling apparatus
C.International Code Flags "November" and "Charlie"
D.Basket hanging in the rigging
单项选择题
You can indicate that your vessel is in distress by（）.
A.displaying a large red flag
B.displaying three black balls in a vertical line
C.sounding four or more short rapid blasts on the whistle
D.continuously sounding the fog whistle
单项选择题
What is the fundamental purpose for imposing radio silence? （）
A.To ensure that interference to proprietary communications is minimized
B.To ensure that only voice communications can be effected on the distress frequency or channel
C.To ensure that a distressed vessel will have a "window" twice each hour for transmitting routine messages
D.To ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized
单项选择题
Which condition represents the appropriate time for setting off distress flares and rockets? （）
A.Only when there is a chance of their being seen by rescue vessels
B.At half hour intervals
C.At one hour intervals
D.Immediately upon abandoning the vessel
单项选择题
Distress signals may be（）.
A.red flares
B.smoke signals
C.sound signals
D.Any of the above
单项选择题
When sending a DSC call，the vessel’s（）.
A.position will automatically be sent
B.position will only be sent if the vessel is making a distress call
C.MMSI will indicate its ocean region
D.None of the above
单项选择题
At night，if you see a vessel ahead displaying the lights shown you should（）.
A.provide assistance as the vessel is in distress
B.stay clear as the vessel is transferring dangerous cargo
C.stay clear as the vessel is fishing
D.change course to the right as the vessel is crossing your bow