1. Height above sea level

2. Act of touching down on the ground

3. Act of becoming airborne

4. Ability to maneuver the helicopter

5. Incline or decline of the ground

6. Metal tubes on which helicopter lands

6. Flashing light on the helicopter

7. Act of traveling in the air

8. Rear part of the helicopter

9. Person who controls the helicopter

10. Rate of motion

11. Measurement from base to top

12. Measurement of how heavy something is

13. Communication using gestures or devices

14. Illumination devices on the helicopter

15. Access points to the cabin

16. Device that powers the helicopter

17. Liquid used to power the engine

18. Saving someone in danger

19. Ability to turn around a fixed point