The distance a vessel moves at right a

1、An anemometer on a moving vessel measu

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 directio

2、The maximum distance at which a light

The maximum distance at which a light may be seen under the existing visibility conditions is called（）.Anominal rangeBluminous rangeCcharted rangeDgeographic range

3、The vessel is at a speed of 16（）.

The vessel is at a speed of 16（）.Akilometers per hourBmiles per hourCrevolution per minuteDmeters per hour

4、The distance that a ship moves forward

The distance that a ship moves forward with each revolutionof its propeller，if there is no slip，is called（）.AadvanceBhead reachCpitchDtransfer

5、If a line at right angles to the axis

If a line at right angles to the axis rotates about that axis and, at the same time, moves parallel to the axis, it will generate （）.Aa helixBa helicoidalCa curveDa cone

6、The distance a vessel moves parallel t

The distance a vessel moves parallel to the original course from the point where the rudder is put over to any point on the turning circle is called the（）.AadvanceBdrift angleCpivoting pointDtransfer