When approaching a helicopter, whether the rotor blades are moving or not, you should:

A. never duck under the body or the tail boom because the pilot cannot see you in these areas.
B. remember that the main rotor blade is flexible and can dip as low as 5? to 6? from the ground.
C. carefully approach the aircraft from the rear unless a crew member instructs you to do otherwise.
D. approach the aircraft from the side because this will make it easier for you to access the aircraft doors.

Answer: A. never duck under the body or the tail boom because the pilot cannot see you in these areas.