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
第1题：
If the current and wind are in opposite directions，the sea surface represents ______.
A.a greatly reduced wind speed
B.a higher wind speed than what really exists
C.a lower wind speed than what really exists
D.more turbulent winds
第2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 speed
B.change course and put the stern to the wind
C.change course to put the wind on either beam and increase speed
D.remain on course but slack the speed
第3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 speed
B.remain on course but slack the speed
C.change course to put the wind on either beam and increase speed
D.change course and put the stern to the 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：
Apparent wind speed blowing across a vessel under tow can be measured by a(n)______．
A.barometer
B.wind vane
C.anemometer
D.Thermometer
第6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7题：
A wind vane on a moving vessel shows ______.
A.dead reckoning wind direction
B.true wind direction
C.apparent wind direction
D.estimated wind direction
第8题：
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
第9题：
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 speed
B.sound the danger signal
C.keep out of the way of the other vessel
D.turn to port and come into the wind
第10题：
stopped with the wind dead ahead
stopped with the wind on the beam
underway with the wind 30°on the bow
underway on a course to provide no apparent wind