A.every station in one chain to transmit at the same time
B.each station to transmit without reference to another station
C.on-line transmission of single-line transmitters at the same time
D.each station to only depend on the master for synchronization and signal ratio
您可能感興趣的試卷
你可能感興趣的試題
A.the rotation of the earth on its axis
B.convection currents caused by differences in radiant heating between equatorial and polar regions
C.mountain ranges
D.All of the above
A.the letters ICW after the aid's number or letter
B.yellow stripes，squares，or triangles marked on them
C.white retroreflective material
D.the light characteristic and color for lighted aids
A.Bayou Sara
B.Baton Rouge
C.Head of Passes
D.Red River Landing
A.Thimble Shoal Main Channel or the South Auxiliary Channel
B.Any of the channels but keep to the right hand side
C.The South Auxiliary Channel
D.Thimble Shoal Main Channel
A.Any span is navigable
B.Northbank or Southbank
C.Southbank span only
D.Northbank span only
最新試題
All Loran-C transmitting stations are equipped with cesium frequency standards which permit （）.
An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.
All of the following are part of the fire triangle EXCEPT（）.
All personnel on board a vessel should be familiar with the rescue boat’s（）.
An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.
An aneroid barometer on a boat should always be（）.
An example of a grade B product is（）.
An airplane should NOT send which signal in reply to a surface craft?（）
An advantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it（）.
An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes? （）