[单选题] What does the abbreviation VHF stand for？
A. Vessel's Hoisting Flag
B. Very High Safety
C.Vessel's Homing Frequency
D. Very High Frequency

[单选题] What does the abbreviation VHF stand for？ ______.
A. Vessel's Hoisting Flag．
B. Very High Safety．
C. Vessel's Homing Frequency．
D. Very High Frequency

[单选题] What does ECDIS stand for?
A.Electrical Chart Display and Indication System
B.Electronic Chart Display and Information System
C.Electric Chart Display and Informing System
D.Electronic Chart Display and Indicating System

[单选题] What does OBO mean?
A. Oil Bulk Oil
B. Ore Bulk Oil
C. Only Bulk Ore
D. Only Basic Oil

[单选题] What does a Racon help with?
A.Measuring the distance
B.Measuring the relative speed
C.Identifing a vessel
D.Identifing a seamark

[单选题]VHF用于（ ） What is funcation of VHF?
A.飞机与飞机间远距离语音通讯 The long distance vioce commnication between aircraft.
B.飞机与地面间近距离语音通讯 The short distance vioce commnication between aircraft and ground station.
C.飞机与飞机，飞机与地面间近距离语音通讯 The short distance vioce commnication between aircraft and aircraft or ground station.

[单选题] What does not contribute to the commercial GPS receiver position error ________．
A.Satellite clock
B.Ship's speed
C.Atmospheric/ionospheric propagation
D.Receiver

[单选题] What does the term TO NAVIGATE WITH CAUTION mean?
A. To navigate intentionally
B. To navigate intensely
C. To navigate carefully
D. To navigate completely

[单选题] What does a navigator who uses an ECDIS require?
A. Good navigational knowledge and a professional job attitude
B. Good computer knowledge
C. Good system knowledge
D. Nothing special

[单选题] What does the DSC control unit do if the GMDSS radio operator fails to insert updated information when initiating a DSC distress alert ________．
A.It will abort the transmission and set off an audible alarm that must be manually reset
B.It will initiate the DSC distress alert but，as no information will be transmitted，rescue personnel will not be able to identify the vessel，its position or its situation
C.It will initiate the DSC distress alert and default information will automatically be transmitted
D.It will initiate the DSC distress alert，but any station receiving it will have to establish contact with the distressed vessel to determine its identity，position and situation

[单选题] What does the term “tide” refer to?
A. Horizontal movement of the water
B. Vertical movement of the water
C. Mixing tendency of the water
D. Salinity content of the water

[单选题]includes.VHF系统包括（ ） What parts of the VHF system
A.天线、 收发机 、 耦合器 Antenna,transceiver ,coupler
B.天线、收发机、控制面板 Antenna, transceiver and control panel.
C.天线 、耦合器、收发机、ACP Antenna,coupler, transceiver and ACP.

[单选题]手提灭火瓶包括哪几个部分? What does a portable fire bottle make up of? ( )
A.瓶体，灭火剂 cylinder, agent
B.操作手柄 operating lever
C.A+B

[单选题] What is the right way to use VHF CH16 and working channel?
A.Ships can call other ships on Ch16 but should move to a working channel as soon as possible.
B.Ship should use working channel to call other ships at any time.
C.Ch16 is only used as the international distress and calling frequency.
D.Ship can use Ch16 or working channel as they like

[单选题] 如果两个频率之间小于( )赫兹VHF1和VHF2之间或VHF3和VHF2之间,就会产生干扰
A. 2赫兹
B. 3赫兹
C. 4赫兹
D. 5赫兹

[单选题]. 如果两个频率之间小于( )赫兹VHF1和VHF2之间或VHF3和VHF2之间,就会产生干扰
A. 2赫兹
B. 3赫兹
C. 4赫兹
D. 5赫兹

[单选题]AMM手册是属于什么类型手册（ ） what type manual does AMM manual belongs to ?
A.客户化手册 customization
B.机型手册 envelope
C.通用手册 general

[单选题] Where does the look-out man stand ________.
A. In positions in which the noises in the ship are least likely to interfere with the hearing of a fog signal and the man can see clearly
B. In positions in which the noises in the ship are much likely to interfere with the hearing of a fog signal
C. In positions in which the hearing of a signal is reduced to a minimum
D. In a position in which the man can see clearly

[单选题] International distress signal in VHF calling for help is ______．
A.Help，Help，Help
B.Mayday，Mayday，Mayday
C.Save，Save，Save
D.Rescue，Rescue，Rescue

[单选题]VHF-DSC使用的频道为 ?
A.VHF CH16
B.VHF CH70
C.VHF CH08