單項選擇題Concerning the identification signal for a pilot vessel，in fog，which statement is TRUE?（）

A.When at anchor，the pilot vessel is only required to sound anchor signals
B.The identification signal must be sounded any time the pilot vessel is underway
C.The pilot vessel may only sound the identity signal when making way
D.All of the above


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1.單項選擇題Concerning a celestial observation，the azimuth angle is measured from the principal vertical circle to the（）.

A.Greenwich celestial meridian
B.hour circle of the body
C.local celestial meridian
D.vertical circle of the body

2.單項選擇題Compliance with the terms of the load line certificate on a ship is the responsibility of the（）.

A.Ballast Control Operator
B.Barge Supervisor
C.Master or Offshore Installation Manager
D.operators representative

3.單項選擇題Complete information on weather broadcasts throughout the world is contained in（）.

A.Selected Worldwide Marine Weather Broadcasts
B.your local newspaper
C.the Notice to Mariners
D.the daily weather map

4.單項選擇題Compared to internal structural plating，the exterior hull plating on a ship is usually（）.

A.stronger
B.thinner
C.more corrosion resistant
D.a lower grade steel

5.單項選擇題Compared to a low pressure system，generally the air in a high is（）.

A.warmer，less dense，and less stable
B.cool，more dense，and drier
C.muggy and cloudy
D.extremely moist with high relative humidity