When underway in a channel,you should keep to the（）.

A . Channel 6 DSC B . Channel 6 Radiotelephony C . Channel 13 Radiotelephony and channel 16 DSC D . Channel 70 DSC

A . The vessel moving upstream against the current B . The vessel moving downstream with a following current C . The vessel located more towards the channel centerline D . The vessel with the least amount of maneuverability

A . active / active using spanning tree B . active / active C . active / passive using spanning tree D . active / passive

A .  An interface ’san-port-channel’ in NXOS B .  An interface ’port-channel’ in NXOS C .  An interface ’port-channel’ with ’mode fc’ configured D .  An interface ’fc-port-channel’ in NXOS

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 communicatio

A . come right B . sound the danger signal C . continue on your course D . come left

A . the shape of an unlighted buoy B . the light color of a lighted buoy C . the color of the topmost band D . whether the number is odd or eve

A . light characteristic B . color of the uppermost band C . shape of an unlighted buoy D . color of the light

A . wearing a life jacket B . wearing a safety harness secured to the stage C . wearing both a life jacket and a safety harness secured to the stage D . the vessel is not making way

A . stay near the middle of the channel B . keep to the starboard side of any vessels you meet C . exchange whistle signals with any other vessels in the channel D . keep to the side of the channel which lies to your starboard

A . not under command B . being towed C . on pilotage duty D . aground

A . 7 B . 14 C . 20 D . 30

A . Middle of the channel B . Starboard side of the channel C . Port side of the channel D . Side of the channel that has the widest tur

A . one blast，4 to 6 seconds in duration B . three blasts，4 to 6 seconds in duration C . one continuous blast until you are able to see around the bend D . one blast，8 to 10 seconds in duratio

A . having engaged in fishing B . engaging in fishing C . engaged in fish D . engaged in fishing

A . are the same as their Light List number B . are marked in 6 inch figures with retroreflective material C . increase with the even numbers to starboard D . decrease with the odd numbers to starboard

A . conduct a fire drill B . conduct a boat drill C . log the fore and aft draft marks D . test the emergency generator

A . vessel not under command B . sailing vessel C . vessel being towed (manned) D . vessel being towed (unmanned)

A . fibers are terminated incorrectly on a node B . the channel number in the received K1 byte is not identical to the channel number transmitted in the K2 byte C . the channel number in the received C1 byte is not identical to the channel number transmitted in the C2 byte D . the channel number in the received C2 byte is not identical to the channel number transmitted in the C1 byte E . the channel number in the received K2 byte is not identical to the channel number transmitted in the K1 byte

A、cross the channel as you are the stand-on vessel B、cross only if the vessel in the channel is approaching on your port side C、not cross the channel if you might impede the other vessel D、sound the danger signal

A . Yours is the give-way vessel because it is less than 30 meters long B . You shall not impede the safe passage of the tanker C . The tanker is the stand-on vessel because it is to port of your vessel D . The tanker is the stand-on vessel because it is the larger of the two vessel

A . Passengers are excluded from the pilothouse while underway B . Passengers are permitted in the pilothouse during daylight hours only C . Passengers are permitted to visit the pilothouse when authorized by the Master and officer of the watch D . Passengers are permitted in the pilothouse when they are escorted by a ship's officer