23. A SEAMARK, I. E. A BUOY, INDICATING THE NORTH. EAST, S

23. A SEAMARK, I. E. A BUOY, INDICATING THE NORTH. EAST, SOUTH OR WEST FROM A FIXED POINT, E. G. A  WRECK is

A.

A. Entrance buoy

B.

 B. New buoy

C.

  C. Port buoy

D.

  D. Cardinal buoy 

正确答案是D