單項選擇題The expression DROP ANCHOR means（）.

A.hold anchor
B.leave anchor
C.let go anchor
D.weigh anchor


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1.單項選擇題The best method to stop a vessel from dragging anchor in a sand bottom is to（）.

A.reduce the length of the cable
B.pay out more anchor cable
C.back the engines
D.swing the rudder several times to work the anchor into the bottom

3.單項選擇題In radiotelephone communications，the prefix PAN-PAN indicates that（）.

A.a ship is threatened by grave and imminent danger and requests immediate assistance
B.a calling station has an urgent message about the safety of a person
C.the message following the prefix will be about the safety of navigation
D.the message following is a meteorological warning

4.單項選擇題Fog forms when the air（）.

A.is 50% water saturated
B.is 90% water saturated
C.temperature is greater than the dew point temperature
D.temperature is equal to，or below the dew point temperature

5.單項選擇題Five or more short blasts on a vessel’s whistle indicates that she is（）.

A.in doubt that another vessel is taking sufficient action to avoid a collision
B.altering course to starboard
C.altering course to port
D.the stand-on vessel and will maintain course and speed