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Defi nitions
The following is a list of abbreviations and acronyms commonly used by military jumpmasters that also relate specifi cally to this accessory:
AGL
Above Ground Level
CD
Canopy Drift
DIP
Desired Impact Point
DZ
Drop Zone
DZSTL
Drop Zone Support Team Leader
LFFD
Free Fall Drift
HAHO
High Altitude High Opening
HALO
High Altitude Low Opening
HARP
High Altitude Release Point
MSL
Mean Sea Level
NOAA
National Oceanographic & Atmospheric Administration
PRP
Primary Release Point
The following list of additional terms are often used by jumpmasters:
Drop Altitude
Forward Throw
HAHO Jump
HALO Jump
K values
Opening Altitude
Static Jump
The following "typical" example is used in jumpmaster training courses. While the solution to this problem is outside the scope of this document, this
example is included to give an idea of the capabilities of the Jumpmaster accessory.
EXAMPLE: HALO JUMP
The exit altitude is 14,000 feet. The jumpmaster wants 1,000 feet for canopy assembly and a 1,000-foot arrival altitude over the DZ.
Winds are as follows:
Altitude
14000
12000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
The jumpmaster plans a course to the HARP at 235 degrees at 300 feet forward throw. Given the coordinate for the DIP, calculate the HARP.
4
Altitude measure
drift while parachute is open
location where landing should occur
area where landing should occur
drift before parachute is open
type of jump
type of jump
location jumper exits from aircraft
Altitude measure
HARP plus forward throw of aircraft
Altitude when jumpmaster exits aircraft, measured in AGL
Horizontal distance traveled by due to aircraft speed
Type of jump where the jumpmaster jumps from a very high altitude and opens chute at a high altitude
Type of jump where the jumpmaster jumps from a very high altitude and opens chute at a low altitude
Wind drag values for parachutes
Altitude when jumpmaster opens chute, measured in AGL
Type of jump where wind speed and direction are assumed constant for the duration of the jump
Velocity
Direction
25
090
22
080
21
090
21
090
20
085
18
080
18
080
17
085
16
080
12
075
12
080
8
080
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