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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 useB.After determining that geographic distance from the dis

题目

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

相似考题

1.29．__________ when you are on the bus or bike．A． Radio can be listenedB．TV can be watchedC． Radio can be listened toD． TV can be used

2.What is meant by the term“radio silence”________．A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channelB.Stations remaining off the air to safeguard proprietary informationC.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting“window”for distressed vessels to transmit distress alerts using J3ED.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic

3.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 beaconB.The coded signal identifies the nature of the distress situationC.The coded signal only identifies the vessel's name and port of registryD.If the GMDSS Radio Operator does not program the EPIRB，it will transmit default information such as the follow-on communications frequency and mode

4.Which of the following statements is TRUE regarding crane operations ________．A.Radio communications allow the crane operator to disregard the use of hand signalsB.The crane operators and signalman must be familiar with the correct hand signalsC.The forward cranes can be operated from the bridgeD.The aft cranes can be operated from the aft steering station

更多“When can routine communications be resumed on a frequency or channel on which radio silenc ”相关问题

  • 第1题：

    Which statement is TRUE ________．

    A.GMDSS radio logs are required to contain entries pertaining to all incidents connected to radio communication service which appear to be of importance to the safety of life at sea

    B.All distress communications must be entered in the GMDSS radio log．

    C.Both of the above

    D.None of the above


    正确答案：C

  • 第2题：

    If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies, which frequency should you call on ?______.

    A.Calling frequency

    B.Distress frequency

    C.Urgency frequency

    D.Working frequency


    正确答案：D
    如果你知道你船在甚高频上呼叫保持工作和职守频率，你将呼叫哪个频率？工作频率。

  • 第3题：

    Which value is NOT supported by Cisco Spectrum Expert， when checking for RF coverage？（）

    • A、Access point received-signal strength level
    • B、Spectrum utilization
    • C、Client data rate
    • D、In-band radio frequency interference

    正确答案:C

  • 第4题：

    Which type of interference is produced by other transmitters on the same frequency? （）

    • A、Double interference
    • B、Co-channel interference
    • C、Adjacent channel interference
    • D、Reflected interference
    • E、Timing interference

    正确答案:B

  • 第5题：

    单选题
    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


    正确答案： C
    解析： 暂无解析

  • 第6题：

    单选题
    If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies，which frequency should you call on? （）
    A

    Calling frequency

    B

    Distress frequency

    C

    Urgency frequency

    D

    Working frequency


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    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


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Which statement is TRUE（）.
    A

    GMDSS radio logs are required to contain entries pertaining to all incidents connected to radio communication service which appear to be of importance to the safety of life at sea

    B

    All distress communications must be entered in the GMDSS radio log

    C

    Both of the above

    D

    None of the above


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    Routine radio communications should be no more than（）.
    A

    one minute

    B

    three minutes

    C

    five minutes

    D

    eight minutes


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    When the changing of a VHF channel / frequency is accepted，say（）.
    A

    I am going to change to VHF channel

    B

    I am certainly going to change to VHF channel

    C

    Changing to VHF channel

    D

    VHF channel. has been changed


    正确答案： C
    解析： 暂无解析

  • 第11题：

    多选题
    Which of the following statements regarding ISDN are correct?（）
    A

    Each ISDN B channel has transmission speeds of up to 64 kbps.

    B

    The ISDN B channel can carry video, voice or data.

    C

    The ISDN B channel transmission rate varies depending on the service used.

    D

    The ISDN D channel transmits control information.

    E

    The ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.


    正确答案： C,E
    解析： 暂无解析

  • 第12题：

    单选题
    The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
    A

    magnetron

    B

    receiver

    C

    indicator

    D

    modulator


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Which statement is TRUE ________．

    A.Key letters or abbreviations may not be used in GMDSS radio logbooks under any circumstance

    B.Urgent communications do not need to be entered in the GMDSS radio log

    C.Both of the above

    D.None of the above


    正确答案：D

  • 第14题：

    Which of the following statements regarding ISDN are correct?（）

    • A、Each ISDN B channel has transmission speeds of up to 64 kbps.
    • B、The ISDN B channel can carry video, voice or data.
    • C、The ISDN B channel transmission rate varies depending on the service used.
    • D、The ISDN D channel transmits control information.
    • E、The ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.

    正确答案:A,B,D

  • 第15题：

    Which logical channel must be dimensioned for each cell when considering the call set-up frequency? （）

    • A、SACCH
    • B、SDCCH
    • C、FCCH
    • D、SCH
    • E、BCCH

    正确答案:B

  • 第16题：

    Which statement about SAN port channels configured on Cisco Nexus 5000 Series Switches is true？（）  

    • A、 A single SAN port channel can have both Fibre Channel and virtual Fibre Channel interfaces. 
    • B、 SAN port channels can include up to 16 interfaces.
    • C、 SAN port channels distribute traffic across all links in the port channel when source ID and destination ID load balancing are used.
    • D、 The links in SAN port channels can be connected to different sets of switches.
    • E、 The On mode of operation means ports only operate as part of a SAN port channel or remain inactive.

    正确答案:E

  • 第17题：

    单选题
    When can routine communications be resumed when 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

    Routine communications can resume 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

    If，in the Master's opinion，communications on that frequency will interfere with emergency communications


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （）
    A

    No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency

    B

    The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received

    C

    The Operator should immediately set continuous watch on VHF channel 70

    D

    The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    Which statement is TRUE（）.
    A

    Key letters or abbreviations may not be used in GMDSS radio logbooks under any circumstance

    B

    Urgent communications do not need to be entered in the GMDSS radio log

    C

    Both of the above

    D

    None of the above


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    Which value is NOT supported by Cisco Spectrum Expert， when checking for RF coverage？（）
    A

    Access point received-signal strength level

    B

    Spectrum utilization

    C

    Client data rate

    D

    In-band radio frequency interference


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    An alternator switchboard has a synchroscope and synchronizing lamps, if the synchroscope is broken, which of the steps listed is the most essential before an alternator can be paralleled with the bus （）
    A

    The breaker should be closed when one synchronizing lamp is dark and the other is bright

    B

    The breaker should be closed when both synchronizing lamps are bright

    C

    The frequency meter should be used to determine that the incoming alternator frequency is slightly higher than the bus

    D

    A portable phase sequence indicator must be used to verify the information from the lamps


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    How is “radio silence” imposed?（）
    A

    By the On Scene Coordinator (OSC)

    B

    By the Coast Earth Station (CES) controlling the distress communications on that frequency

    C

    It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channel

    D

    It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    What is meant by the term “radio silence”?（）
    A

    Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel

    B

    Stations remaining off the air to safeguard proprietary information

    C

    Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting window for distressed vessels to transmit distress alerts using J3E

    D

    Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic


    正确答案： A
    解析： 暂无解析

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