超星 - 作业（四）

单选题

Which of the following frequencies have not been designated for on-scene communications in the Global Maritime Distress and Safety System?

A. VHF-Channel 16, 156.8 MHz.
B. MF radiotelephony on 2, 182 kHz.
C. DSC on 156. 525 MHZ.
D. VHF-Channel 16, 156.8 MHz and MF radiotelephony on 2, 182 kHz.

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单选题

Who is responsible for transmitting a message stating that distress communications have ceased?

A. The vessel providing the initial communications with the distressed vessel.
B. The Rescue Coordination Center (RCC) controlling the distress communications
C. The Coast Radio Station (CRS) that was first contacted concerning the distress situation.
D. No formal message must be transmitted as long as no distress-related communication have occurred after reasonable time.

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单选题

If a ship, in accordance with the requirements of regulation 7. 1. 2, is fitted with a VHFradio installation, shall, while it is at sea, maintain a continuous watch on__________ .

A. VHF Ch 16
B. VHF Ch 70
C. 2. 187. 5 kHz
D. all of the above

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单选题

If a ship, in accordance with the requirements of regulation 10. 1. 1, is fitted with an Inmarsat ship earth station, shall, while it is at sea, maintain a continuous watch________.

A. on 8, 414, 5 kHz
B. for satellite shore to ship distress alerts
C. on 2, 187.5 kHz
D. all of the above

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单选题

Which frequency in the medium frequency band is used for distress and safety traffic by radiotelephony?

A. 518 kHz.
B. 2, 182 kHz
C. 2, 614 kHz
D. 6,090 kHz.

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单选题

When a coast station receives a distress alert on DSC equipment, she should__________.

A. acknowledge it within 2 minutes 45 seconds
B. acknowledge it within 3 minutes
C. broadcast in NAVTEX service
D. ignore it

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单选题

The address of acknowledgements of DSC alert should be____________.

A. MMSI of the ship in distress
B. MMSI of the ship (coast) station, who receives the alert
C. to all ships
D. to RCC concerned

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单选题

How many blips appeared on the screen of SART-detecting radar?

A. 6
B. 8
C. 12
D. At least 12

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单选题

Who can impose silence on stations which interfere with distress traffic?

A. The Personal Radio Communications Branch of the ITU.
B. A radio operator trying to make a phone patch on company official business.
C. A ship looking for navigational information.
D. The administration concerned or coordinator involved in the handling of the emergency traffic.

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单选题

How many total frequencies are available for DSC distress alerting on VHF band?

A. 1
B. 2
C. 5
D. 7

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