Apparent wind speed blowing across a ship under tow can be measured by a(n)（）.

A.a fictitious sun moving along the celestial equator
B.the visible sun moving along the ecliptic
C.the Moon's motion in relation to the Sun
D.the movement of the first point of Aries

A.and Moon and Earth form a right angle
B.and Moon and Earth are in line
C.crosses the celestial equator
D.is farthest from the Earth

A.meet the applicable standards
B.be marked as additional equipment
C.be stowed in a separate area
D.All of the above