网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
What is the calling and distress frequency on a single side band (SSB) marine radiotelephone?（）
A
1492 kHz
B
1892 kHz
C
2082 kHz
D
2182 kHz
参考答案
参考解析
解析：
暂无解析
更多 “单选题What is the calling and distress frequency on a single side band (SSB) marine radiotelephone?（）A 1492 kHzB 1892 kHzC 2082 kHzD 2182 kHz” 相关考题
考题
The maximum data rate of any single wireless link can be described by the shannons theorem which is related to the（）in hertz，and the（）on the channelA．signal frequency B．bandwidth C．carrier frequency D．noise frequency A．signal B．caeeier C．noise D．data signal
考题
International distress signal in VHF calling for help is________.A.Help,Help,HelpB.Mayday,Mayday,MaydayC.Save,Save,SaveD.Rescue,Rescue,Rescue
考题
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 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
考题
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 useB.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC.After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedD.Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
考题
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 frequencyB.Distress frequencyC.Urgency frequencyD.Working frequency
考题
What is the frequency of the front side bus （FSB） on the eX4 architecture？（）A、667 MHzB、533 MHzC、1066 MHzD、333 MHz
考题
What can cause a thread to become non-runnable？（）A、 Exiting from a synchronized block.B、 Calling the wait method on an object.C、 Calling the notify method on an object.D、 Calling the notifyAll method on an object.
考题
单选题What is the frequency of the front side bus （FSB） on the eX4 architecture？（）A
667 MHzB
533 MHzC
1066 MHzD
333 MHz
考题
单选题International distress signal in VHF calling for help is（）.A
Help，Help，HelpB
Mayday，Mayday，MaydayC
Save，Save，SaveD
Rescue，Rescue，Rescue
考题
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 useB
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC
After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concludedD
Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
考题
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 useB
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communicationsC
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 concludedD
If，in the Master's opinion，communications on that frequency will interfere with emergency communications
考题
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 frequencyB
Distress frequencyC
Urgency frequencyD
Working frequency
考题
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 frequencyB
The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was receivedC
The Operator should immediately set continuous watch on VHF channel 70D
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
考题
单选题Distress and safety communications following DSC calling will be performed by radiotelephony or（）.A
NBDPB
EGC receiverC
NBDP or bothD
EGC receiver or both
考题
单选题What is the fundamental purpose for imposing radio silence? （）A
To ensure that interference to proprietary communications is minimizedB
To ensure that only voice communications can be effected on the distress frequency or channelC
To ensure that a distressed vessel will have a window twice each hour for transmitting routine messagesD
To ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized
考题
单选题What is the primary purpose for Digital Selective Calling (DSC)?（）A
DSC provides reception of weather and navigational warnings plus search and rescue informationB
DSC provides low-cost，routine communications for the vessel operatorC
DSC is to be used for transmitting and receiving distress alerts to and from other ships or coast radio stations via radioD
This aids SAR authorities in tracking a vessel's position by satellite
考题
单选题Whenever your marine radio is on，FCC Rules require you to monitor（）.A
a commercial ship-to-ship channelB
the last frequency that was usedC
the distress and calling frequencyD
the radio only if expecting a call
考题
单选题（）is used for calling and replying,and for transmitting acknowleding and relaying distress alerts.A
NAVETEX receiverB
Search and Rescue TransponderC
Emergency Position Indicating Radio BeacomD
Digital selective calling
考题
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 frequencyC
It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channelD
It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel
考题
单选题Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）A
If no answer is received on the designated distress frequencies，repeat the distress call on any frequency availableB
Channel 16 (156.8) may be used for distress messagesC
It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds durationD
Distress messages should first be transmitted on 2182 kHz
考题
单选题The transmission time duration of a single pulse of radio-frequency energy is a function of the（）.A
persistenceB
pulse repetition rateC
pulse lengthD
resolution
考题
单选题You are proceeding to a distress site．The survivors are in liferafts.What will make your ship more visible to the survivors（）.A
Steering a sinuous courseB
Steering a zig-zag courseC
Turning on all available deck lights at nightD
Dumping debris over the side to make a trail to your vessel
考题
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 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
考题
单选题It is easier to dock a right-hand，single-screw vessel（）.A
starboard side to the wharfB
either side to the wharfC
port side to the wharfD
stern to the wharf
热门标签
最新试卷