Garmin eTrex Vista C Jumpmaster   - Page 4

Definitions The following is a list of abbreviations and acronyms commonly used by military jumpmasters that also relate specifically to this accessory: AGL Above Ground Level Altitude measure CD Canopy Drift drift while parachute is open DIP Desired Impact Point location where landing should occur DZ Drop Zone area where landing should occur DZSTL Drop Zone Support Team Leader LFFD Free Fall Drift drift before parachute is open HAHO High Altitude High Opening type of jump HALO High Altitude Low Opening type of jump HARP High Altitude Release Point location jumper exits from aircraft MSL Mean Sea Level Altitude measure NOAA National Oceanographic & Atmospheric Administration PRP Primary Release Point HARP plus forward throw of aircraft The following list of additional terms are often used by jumpmasters: Drop Altitude Altitude when jumpmaster exits aircraft, measured in AGL Forward Throw Horizontal distance traveled by due to aircraft speed HAHO Jump Type of jump where the jumpmaster jumps from a very high altitude and opens chute at a high altitude HALO Jump Type of jump where the jumpmaster jumps from a very high altitude and opens chute at a low altitude K values Wind drag values for parachutes Opening Altitude Altitude when jumpmaster opens chute, measured in AGL Static Jump Type of jump where wind speed and direction are assumed constant for the duration of the 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 Velocity Direction 14000 25 090 12000 22 080 10000 21 090 9000 21 090 8000 20 085 7000 18 080 6000 18 080 5000 17 085 4000 16 080 3000 12 075 2000 12 080 1000 8 080 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