更多"DSC distress relays can be transmit"的相关试题:
[单项选择]If a ship station relays a DSC distress call to an appropriate coast station, it means that（）.
A. the ship has received the DSC distress call on a HF frequency
B. the coast station concerned has not acknowledged it within 5 minutes
C. the ship will take command of search and rescue in 5 minutes
D. A and B
[单项选择]If a DSC distress relay is transmitted from coast station , it will（）.
A. indicate the ship in distress that the alert has been received
B. alert ships in the area of a distress incident that a distress has occurred
C. inform other coast station of distress incident
D. repeat the distress alert in 5 minutes
[单项选择]In the GMDSS, distress alerting can be transmitted in（）directions.
A. 1
B. 2
C. 3
D. 4
[单项选择]Mariners can use DSC for（）.
A. general communication
B. distress alerting and safety calling
C. receive MSI
D. both B and C
[填空题]Consonant sounds can be either （）or（）,while all vowel sounds are （）.
[单项选择]对于现在DSC8+系统DSC总成内有（）个单向阀。
A. 6
B. 7
C. 8
D. 9
[单项选择]DSC distress acknowledgements are normally transmitted by（）in respond to a receiver DSC distress call.
A. Ship stations
B. Coast stations
C. NCSs
D. NCC
[单项选择]Distress and safety communications following DSC calling will be performed by radiotelephony or（）.
A. NBDP
B. EGC receiver
C. NBDP or both
D. EGC receiver or both
[单项选择]在检查甚高频无线电话装置（VHF）时，当具有数字选择性呼叫装置（DSC）时，应用（）在DSC工作方式下，进行文件的编辑、贮存、发射和接受的效用实验。
A. 6频道
B. 16频道
C. 65频道
D. 70频道
[多项选择]DSC的检纠错方式有（）
A. 7单元4B/3Y检错码
B. 十单元7/3码进行水平方向检错
C. ARQ工作方式
D. 采用垂直校验符
E. 采用二重时间分集方式发送
[单项选择]If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）
A. The transmission is aborted and an alarm sounds to indicate this data must be provided by the operator
B. The transmission is not initiated and "ERROR" is indicated on the display readout
C. The transmission will be made with "default" information provided automatically
D. The receiving station will poll the DSC unit of the vessel in distress to download the necessary information
[多项选择]DSC遇险呼叫应包含下列信息（）
A. 本次呼叫性质
B. 本次呼叫地址
C. 本次呼叫类别
D. 随后通信方式
E. 随后通信使用频率
F. 遇险船性质和位置
[单项选择]If no distress acknowledgement is received（）a DSC distress call transmission, then the ship in distress may repeat the DSC distress call attempt after a delay of between 3.5 and 4.5 minutes from the beginning of the initial call.
A. relevant to
B. relate to
C. in response to
D. in relation to
[单项选择]什么情况下DSC系统应该退出工作（）
A. 在冰上行走
B. 当使用防雪链时
C. 在制动检测器上
D. 在非常松软的路面
[多项选择]以下哪个系统属于DSC8+系统（）
A. 干燥制动
B. 制动准备
C. 自动软停功能和起步辅助系统
D. 制动衰减支持
[多项选择]MF/HF DSC采用（）方式发射。
A. F1B
B. F2B
C. J2B
D. G2B
E. J2E
