DZ Selection Survey

Question 1

8. What are the eight DZ selection factors?

Answer 1

Airdrop airspeeds (a/c dependent), drop altitude, type of load (personnel or equipment), method of delivery (high/low velocities, free drop), obstacles, access, adequate approach and departure routes, size of the drop zone

Question 2

9. What is the drop speed of a UH-60?

Answer 2

65 to 75 knots (best speed is 70 knots)

Question 3

10. What is the drop speed of a CH-47?

Answer 3

80 to 110 knots (best speed is 90 knots)

Question 4

11. What is the drop speed of C-5/130/141/KC-130 for personnel?

Answer 4

130 to 135 knots (best speed is 130 knots)

Question 5

12. What is the drop speed of C-5/130/141/KC-130 for door bundles, CDS, and HVY equipment?

Answer 5

130 to 150 knots (best speed is 130 knots)

Question 6

13. What is the drop speed of a C-27J?

Answer 6

125 knots

Question 7

14. What does AGL stand for?

Answer 7

Above Ground Level

Question 8

15. What does MSL stand for?

Answer 8

Mean Sea Level

Question 9

16. What does FI stand for?

Answer 9

Feet Indicated

Question 10

17. How do you calculate FI?

Answer 10

Obtain altitude of highest point on DZ (MSL) and add desired drop altitude of the A/C (AGL)

Question 11

18. How much do you need to add to the drop altitude for non-standard aircraft if the DZ’s elevation is 5,000’ or higher?

Answer 11

500 feet

Question 12

19. What is the minimum rotary-wing drop altitude at 90 knots?

Answer 12

1250 feet

Question 13

20. What is the minimum rotary-wing drop altitude for door bundles?

Answer 13

300 feet(day), 500 feet(night)

Question 14

21. What is the minimum fixed-wing drop altitude for basic airborne training?

Answer 14

1250 feet

Question 15

22. What is the minimum fixed-wing drop altitude for door bundles?

Answer 15

300 feet

Question 16

23. What is the minimum drop altitude for a door bundle from a C-130 using a G-14 cargo parachute?

Answer 16

300 feet

Question 17

24. How long is the interval between equipment and paratrooper drops?

Answer 17

Three seconds

Question 18

25. True or false, bundles and personnel can exit the a/c simultaneously?

Answer 18

False

Question 19

26. What are the three types of airdrops?

Answer 19

High velocity, low velocity, free drop

Question 20

27. What is a high velocity airdrop?

Answer 20

A drogue chute stabilizes and keeps the load upright, but does not slow rate of descent

Question 21

28. What is a low velocity airdrop?

Answer 21

The parachute slows the rate of descent for a soft landing

Question 22

29. What is a free drop?

Answer 22

No device to stabilize or slow the descent

Question 23

30. What are the four airdrop release methods?

Answer 23

Computed Air Release Point (CARP), Ground Marking Release System (GMRS), Verbally Initiated Release System (VIRS), Wind Stream Vector Count (WSVC)

Question 24

31. At what height are trees considered an obstacle?

Answer 24

35 feet

Question 25

32. When is water considered an obstacle?

Answer 25

4’ deep or more, 40’ wide at widest point and within 1000m from any edge of the DZ

Question 26

33. When are wires considered an obstacle?

Answer 26

Any wires carrying 50+ volts within 1000m from any edge of the DZ.

Question 27

34. When does the power company need to shut of power for an airborne operation?

Answer 27

NLT 15 minutes prior to time on target

Question 28

35. What are the considerations for drop zone approach/departure routes?

Answer 28

No fly zone/adjacent air operations, Obstacles, Terrain, Enemy situation/location (NOTE)

Question 29

36. What is the minimum ground space required for personnel jumping from a fixed-wing a/c utilizing a CARP release?

Answer 29

549m x 549m (600x600 yards) for one jumper from 1000’ AGL

Question 30

37. What is the minimum ground space required for personnel jumping from a fixed-wing a/c utilizing GMRS or VIRS release?

Answer 30

275m x 275m (300x300 yards)

Question 31

38. Whose responsibility is it to determine DZ size requirements?

Answer 31

Commander of the Air Lift Forces (COMALF) and the Army Battle Command (ABC)

Question 32

39. What is the form for a DZ survey?

Answer 32

AF 3823

Question 33

40. What are the two types of DZ surveys?

Answer 33

Existing and Tactical

Question 34

41. How long is a DZ survey good for?

Answer 34

5 years from MAJCOM signature

Question 35

42. How long is a Tactical DZ survey good for?

Answer 35

Single use

Question 36

43. Who is responsible for aircraft safety of flight under a tactical DZ survey?

Answer 36

Airlift unit