variable
changing
backing
veering
第1题:
Set of current is ________ .
A.its velocity in knots
B.direction from which it flows
C.estimated current
D.direction toward which it flows
第2题:
When recording the wind direction in the weather log,you would report the ______.
A.direction the wind is blowing toward
B.direction the wind is blowing from
C.duration of the maximum gust of wind
D.wind chill factor
第3题:
SHIFT OF WIND DIRECTION IN AN ANTICLOCKWISE MANNER, FOR EXAMPLE FROM NORTH TO WEST ( OPPOSITE OF VEERING ) defines ______.
A.Backing (of wind)
B.Veering (of wind)
C.Shifting of wind
D.altering of wind
第4题:
In the Northern Hemisphere a wind is said to veer when the wind ______.
A.changes direction clockwise, as from north to east, etc
B.changes direction counterclockwise, as from south to east, etc
C.changes direction violently and erratically
D.remains constant in direction and speed
第5题:
The velocity of the apparent wind can be more than the true wind,and come from the same direction,if certain conditions are present.One condition is that the ______.
A.Ship's speed must be less than the true wind velocity
B.True wind must be from dead astern
C.True wind velocity must be faster than the ship's speed
D.True wind must be from dead ahead
第6题:
The best estimate of the wind direction at sea level can be obtained from observing the direction of the ______.
A.cloud movement
B.vessel heading
C.waves
D.swells
第7题:
When a high pressure system is centered north of your vessel in the Northern Hemisphere ______.
A.You should experience hot,moist,clear weather
B.The wind direction is generally easterly
C.The winds should be from the southwest at your location
D.The winds should be brisk
第8题:
The navigational term Set of current means ______.
A.velocity of current in knots
B.direction from which the current flows
C.estimated current
D.direction toward which the current flows
第9题:
Changing direction by bringing the stern of the vessel through the eye of the wind is known as _______.
A.jibing
B.running before the wind
C.Reefing
D.tacking
第10题:
In the southern hemisphere the wind flow associated with a low pressure system will have which of the following characteristic?________.
A.the wind velocity is least near the center of the system
B.th e direction of the flow is counterclockwise
C.both A and B
D.neither A nor B