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
An anemometer on a moving vessel measures ______.
A.apparent wind speed only
B.true wind speed and true wind direction
C.true wind speed only
D.apparent wind speed and true wind direction
相关考题：
A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should ______.A.remain on course and hold speedB.remain on course but slack the speedC.change course to put the wind on either beam and increase speedD.change course and put the stern to the wind
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
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.more turbulent winds
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
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
A wind vane on a moving vessel shows ______.A.dead reckoning wind directionB.true wind directionC.apparent wind directionD.estimated wind direction
Apparent wind speed blowing across a vessel under tow can be measured by a(n)______．A.barometerB.wind vaneC.anemometerD.Thermometer
If a sailing vessel with the wind on the port side sees a sailing vessel to windward and cannot tell weather the other vessel has the wind on the port or starboard side, she shall ______.A.hold course and speedB.sound the danger signalC.keep out of the way of the other vesselD.turn to port and come into the wind
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
单选题When evacuating a seaman by helicopter lift，the vessel should be（）.Astopped with the wind dead aheadBstopped with the wind on the beamCunderway with the wind 30°on the bowDunderway on a course to provide no apparent wind
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（）.Ait will be preceded by a sudden increase in wind speedBit will be preceded by a sudden decrease in wind speedCthe wind speed will not change as it passesDthe wind will back rapidly to left in a counterclockwise direction as it passes
单选题A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) （）.Aestimated positionBdead reckoning positionCfixDNone of the above
单选题If the current and wind are in the same direction，the sea surface represents a wind speed （）.Alower than actually existsBhigher than actually existsCthat actually existsDthat has no proportional relationship
单选题The apparent wind can be zero when the true wind is from（）.Aahead and equal to the ship's speedBastern and equal to the ship's speedCahead and equal to twice the ship's speedDastern and equal to twice the ship's speed
单选题There is a fire aft aboard your vessel. To help fight the fire，you should（）.Aput the wind off either beamBhead the bow into the wind and decrease speedCput the stern into the wind and increase speedDput the stern into the wind and decrease speed
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（）.Aremain on course and hold speedBchange course and put the stern to the windCchange course to put the wind on either beam and increase speedDremain on course but slack the speed
单选题A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should（）.Aremain on course and hold speedBremain on course but slack the speedCchange course to put the wind on either beam and increase speedDchange course and put the stern to the wind
单选题Most of your vessel’s superstructure is forward. How will the vessel lie when drifting with no way on?（）.AWith the wind from aheadBWith the wind off the port beamCWith the wind off the starboard beamDWith the wind from abaft the beam
单选题An anemometer on a moving vessel measures（）.Aapparent wind speed onlyBtrue wind speed and true wind directionCtrue wind speed onlyDapparent wind speed and true wind direction
单选题Apparent wind speed blowing across a vessel under tow can be measured by a(n)（）.AbarometerBwind vaneCanemometerDthermometer
单选题The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.Amust be from dead aheadBspeed must be zeroCmust be from dead asternDmust be on the beam
单选题In the Northern Hemisphere，if your vessel is in a hurricane’s navigable semicircle it should be positioned with the wind on the（）.AStarboard quarter，hold course and make as much speed as possibleBPort bow，hold course and make as much speed as possible until the hurricane has passedCPort quarter，maintain course and make as much speed as possibleDStarboard bow and heave to until the hurricane has passed
单选题You are landing a single-screw vessel，with a right-hand propeller，starboard side to the dock.When you have approached the berth and back the engine，you would expect the vessel to （）.ALose headway without swingingBTurn her bow toward the dockCTurn her bow away from the dockDHead into the wind，regardless of the side the wind is on
单选题In the Northern Hemisphere，the right half of the storm is known as the dangerous semicircle because（）.Athe wind speed is greater here since the wind is traveling in the same general direction as the storm's trackBthe direction of the wind and seas might carry a vessel into the path of the stormCthe seas are higher because of greater wind speedDAll of the above
单选题If the current and wind are in opposite directions，the sea surface represents（）.Aa greatly reduced wind speedBa higher wind speed than what really existsCa lower wind speed than what really existsDmore turbulent winds
单选题Your vessel is off a lee shore in heavy weather and laboring. Which action should you take?（）.APut the sea and wind about two points on either how and reduce speedBHeave to in the trough of the seaCPut the sea and wind on either quarter and proceed at increased speedDPut the bow directly into the sea and proceed at full speed