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If the current and wind are in the same direction，the sea surface represents a wind speed ______.
A.lower than actually exists
B.higher than actually exists
C.that actually exists
D.that has no proportional relationship
参考答案
更多 “ If the current and wind are in the same direction，the sea surface represents a wind speed ______.A.lower than actually existsB.higher than actually existsC.that actually existsD.that has no proportional relationship ” 相关考题
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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 windD.altering of wind
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Solid green arrows on the main body of a pilot chart indicate ______.A.prevailing wind directionsB.prevailing ocean current directionsC.probable surface current flowD.shortest great circle routes
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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 velocityB.True wind must be from dead asternC.True wind velocity must be faster than the ship's speedD.True wind must be from dead ahead
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A wind vane on a moving vessel shows ______.A.dead reckoning wind directionB.true wind directionC.apparent wind directionD.estimated wind direction
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An anemometer on a moving vessel measures ______.A.apparent wind speed onlyB.true wind speed and true wind directionC.true wind speed onlyD.apparent wind speed and true wind direction
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For determining the amount of chains used in anchoring operation, which one of the following factors would’t be considered?______.A.selection of landmarksB.character of sea bottomC.strength of current and wind forceD.radius of ship swing to wind or tide
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In the Northern Hemisphere a wind is said to veer when the wind ______.A.changes direction clockwise, as from north to east, etcB.changes direction counterclockwise, as from south to east, etcC.changes direction violently and erraticallyD.remains constant in direction and speed
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单选题For determining the amount of chains used in anchoring operation,which one of the following factors wouldn’t be considered?（）.A
selection of landmarksB
character of sea bottomC
strength of current and wind forceD
radius of ship swing to wind or tide
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单选题Solid green arrows on the main body of a pilot chart indicate （）.A
prevailing wind directionsB
prevailing ocean current directionsC
probable surface current flowD
shortest great circle routes
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单选题On a clear，warm day，you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead（）.A
it will be preceded by a sudden increase in wind speedB
it will be preceded by a sudden decrease in wind speedC
the wind speed will not change as it passesD
the wind will back rapidly to left in a counterclockwise direction as it passes
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单选题A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) （）.A
estimated positionB
dead reckoning positionC
fixD
None of the above
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单选题If the current and wind are in the same direction，the sea surface represents a wind speed （）.A
lower than actually existsB
higher than actually existsC
that actually existsD
that has no proportional relationship
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单选题In the Northern Hemisphere a wind is said to veer when the wind（）.A
Changes direction clockwise，as from north to east，etcB
Changes direction violently and erraticallyC
Remains constant in direction and speedD
Changes direction counterclockwise，as from south to east，etc
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单选题The best estimate of the wind direction at sea level can be obtained from observing the direction of the（）.A
cloud movementB
vessel headingC
wavesD
swells
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单选题An instrument that indicates wind direction is known as a(n)（）.A
weather vane，wind vane or wind sockB
hydrometerC
hygrometerD
sling psychrometer
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单选题The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.A
temperatureB
densityC
deflectionD
speed
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单选题A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots. You should（）.A
remain on course and hold speedB
change course and put the stern to the windC
change course to put the wind on either beam and increase speedD
remain on course but slack the speed
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单选题When picking up your mooring at the buoy，the correct method is to（）.A
approach the buoy with the wind and current asternB
approach the buoy with the wind and current aheadC
approach the buoy with wind and sea abeamD
stop upwind and up current and drift down on the buoy
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单选题An anemometer on a moving vessel measures（）.A
apparent wind speed onlyB
true wind speed and true wind directionC
true wind speed onlyD
apparent wind speed and true wind direction
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单选题The Rules state that certain factors are to be taken into account when determining safe speed. Those factors include（）.A
state of wind，sea，and current，and the proximity of navigational hazardsB
maximum attainable speed of your vesselC
temperatureD
aids to navigation that are available
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单选题A wind blows round anticlockwise defines（）.A
backing ( of wind )B
beach ( to )C
veering ( of wind )D
maintaining direction of the wind
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单选题In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.A
the wind speed is greater here since the wind is traveling in the same general direction as the storm's trackB
the direction of the wind and seas might carry a vessel into the path of the stormC
the seas are higher because of greater wind speedD
All of the above
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单选题If the current and wind are in opposite directions，the sea surface represents（）.A
a greatly reduced wind speedB
a higher wind speed than what really existsC
a lower wind speed than what really existsD
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单选题Your vessel is off a lee shore in heavy weather and laboring. Which action should you take?（）.A
Put the sea and wind about two points on either how and reduce speedB
Heave to in the trough of the seaC
Put the sea and wind on either quarter and proceed at increased speedD
Put the bow directly into the sea and proceed at full speed
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