Device A mechanical or electronic device which automatically
opens the main or reserve parachute at a set altitude as
a back up for the user. Usually used for student and experienced
AFF Accelerated Freefall Course. The most advanced
method of learning to skydive. A 7 Level ability based learning progression.
It is the course that is accelerated, not the speed of the Freefall. You
have a Terminal Velocity of about 120 mph in freefall
which ever type of course you choose!
AFF CC (Accelerated Freefall
Jumpmaster Certification Course). This is the Certification Course that
must be successfully completed in order for a skydiver to be an USPA
Accelerated Freefall Jumpmaster. Most Jumpmasters will tell you it is the
most difficult rating to achieve in skydiving.
BIC : (Basic instructors
course) Attended in an effort to gain a sufficient level of proficiency
with reference to teaching.
Boogie A usually large skydiver gathering or celebration. Many times these
are made to commemorate a significant anniversary or event. Most "Boogies"
include evening parties, specialty aircraft, and/or discount skydiving prices
to post AFF graduate or licensed skydivers.
Canopy Skydiver talk for a
'Parachute'. See Main Parachute, Reserve
Square Parachute, Round
Parachute, and Elliptical Parachute.
Container The part of a
which contains the Main and
Canopy Relative Work (CRW) Pronounced
CReW. Skydiver talk for Canopy Stacking where Skydivers
under canopy link up to create formations.
Cells The chambers in a ram-air
parachute, made up of two halves. They are delimited by two load bearing
ribs and are split in two by the non-load-bearing rib in between. Most
Canopies have either 9 or 7 Cells, but
they may have as few as 5 or many more than 9 and a Cell may be split into
more than 2 parts. A 9 Cell Canopy is generally a more efficient wing than
a 7 Cell because it has more ribs and can be a better airfoil, however
because they have more ribs and therefore more fabric they do not pack
Dirt Dive Practicing a
dive on the ground before the jump so that all involved understand exactly
what will occur in the sky - since there is not much time up their and
you can't discuss it with a 120 mph wind going past your head.
Elliptical Parachute Like
a Square except elliptical rather than rectangular.
These Canopies are far more radical than Square parachutes
doing 360 degree turns in 1-2 seconds, with the Skydiver and Parachute
parallel to the ground. There are variations between Square and Elliptical,
some called Semi-Elliptical.
FAA Federal Aviation Administration:
Aka. the sky police.
FAI Federation Aeronautique Internationale:
The international body which administers sport aviation throughout the
Fall Rate The rate at which
you fall, another name for terminal velocity except that it refers the
rate relative to other jumpers, rather than an absolute velocity. Fall
rate is adjusted by adjusting body position. Different shape and weight
jumpers in exactly the same body position will fall at different rates.
Fall rate must be adjusted to be the same as everyone else so that the
jumper can do RW.
Formation When referring
to RW a formation is a group of skydivers forming particular pattern by
taking grips on each others arms and legs. The formations that will be
done on a jump are determined and practiced (Dirt
Dived) before the jump. When referring to CRW it
is a formation of Canopies flying together in a predetermined
Grips Sausage shaped things
attached to the arms and legs of a jumpsuit for skydivers to hold on to
ICC : (Instructor certification
course) The course one must attend and successfully pass in order to obtain
an instructor rating.
Harness The part of a Rig
which consists of webbing and metal hardware which you wear and which the
is attached to.
Main Parachute The parachute
you use first. If it doesn't work you use your Reserve.
This happens very rarely and there are Skydivers with thousands of jumps
and no Reserve rides. The Main parachute is
usually much higher performance than the Reserve. There are many types
and brands available, in custom colors for no extra cost if you want, and
they come in all sizes from 69 sqft 9+ Cell parachutes,
for very small, light and/or highly experienced Skydivers, to 280-300 sqft
7 or 9 Cells that students usually use, to 520 sqft 9+ Cells for large
parachutes. These are all
Square parachutes. Round
parachutes are only used as mains for special applications - water jumps
and Pilots Rigs for example.
Mal Skydiver talk for Malfunction.
Malfunction When the
Main Parachute doesn't work properly. There are different degrees of malfunctions,
the bad ones of which cause you to use your Reserve.
Parachutist A person who uses a
parachute. A Parachutist is not necessarily a Skydiver. A Skydiver is only
a Parachutist because they have to be. Note for non-jumpers: do not call
a Skydiver a Parachutist and don't ask them about 'their Parachuting'.
Pilot A person who likes planes
but usually does not jump out of them.
Relative Work (RW) Skydiver talk
for Formation Skydiving where Skydivers in Freefall link up to create formations.
This can be done in any numbers from 2-person (called a 2 Way Skydive)
and up. Competition RW is mainly done in 4 person teams (4 Way Teams) and
in 8 Ways & 16 Ways.
Reserve Parachute The parachute
you use if your Main Mals.
Reserve parachutes must be tested to very strict standards & must be
inspected and repacked by a specially licensed packer at regular intervals,
(every six months in Australia), whether they have been used or not.
Reserve Ride To use
the Reserve Parachute.
Rig What you would think of as
'The Parachute' in the phrase 'To Wear a Parachute'. Consists of a Harness,
Reserve Parachute and the means of
deploying each parachute.
Round Parachute A round parachute.
(We do not use these at Atlanta Skydiving Center). These range from non-steerable
to a bit steer able and the user is mainly at the mercy of the wind. Cannot
really be flared and give fairly hard landings. Works by providing drag
to slow the descent of the Skydiver.
SkyGod We still do not truly know how to define
this term. Should you know its definition please let us know.
Square Parachute An airfoil
shaped ram-air parachute which is actually rectangular with aspect ratio's
from less that 2 up to more than 3.5. The parachute is termed a 'semi rigid
wing'. It is held in a wing shape by the air rushing in the front, keeping
it pressurized. Squares work not by providing drag to slow the descent
but by providing lift as they fly at about a 3:1 glide angle. They therefore
must fly quite fast! and speeds up to 40-50mph in a straight line depending
on the Canopy and the weight of the Skydiver are
possible. They can be flown into the ground at in excess of 80 mph if one
wants to. The most common configurations are 7 and 9 Cells
and they can be made of porous material or non-porous Zero
Static Line Training An outdated method of training
skydivers. The type of training in which a Static Line - a piece of webbing
connected from the airplane to the students Rig opens
the parachute. Like in the old war movies where the soldiers are hooked
up and then jump out, and their parachute opens immediately. (The static
line is like in the old war movies, the rest of the course and the gear
isn't anything like it!).
Tandem Skydiving Atlanta Skydiving
Centers recommended First Jump! The passenger and Instructor are harnessed
together and use a the same main parachute, the student may participate
as much or as little as he or she wishes.
Terminal Velocity The speed
at which a Skydiver falls when the friction of the air on their body is
equal to and counter acts the force of gravity so that they no longer accelerate.
It is about 120 mph in a flat stable position, lying on the air, face down.
The Skydiver can fall faster or slower, up to a point, by changing their
Track To track is to assume
a body position which gives a very high horizontal speed.
USPA United States Parachute
Whuffo Person observing skydiving activities
from the ground sometimes with a dazed look on their face asking "Whuffo they
Zero Porosity (ZP/Zero-P) Means
Non-porous to air. (Not technically the correct term, but it's the one
Skydivers use). Air does not go through it making ZP Canopies
very efficient wings.
AFF JumpMaster : An individual
who has obtained certification from the USPA that allows
him or her to "JumpMaster" or coach AFF students. The minimum requirements
to be eligible for this rating is any jumpmaster candidate must have 6
hours of logged freefall and must have successfully completed the AFF
Camera Flyer : (Videographers)
at Atlanta Skydiving Center must demonstrate a proficiency in human body
flight and camera / video work, and must posses a superior personality.
Only the best skydive video personnel in the country are selected to work
Demo Jumper : An individual
who has attained the level of experience and accuracy through canopy (parachute)
manipulation necessary to land consistently in a confined area. These jumpers
are certified capable of performing Demonstration Jumps into commercial
Instructor : An
individual who has obtained certification from the USPA
that allows him or her to provide ground instruction or training to AFF
skydiving students. An USPA instructors rating must be obtained prior to
teaching a first jump or parachuting course. Minimum requirements
that must be met in order to achieve this rating are the applicant must
have successfully completed the BIC, must hold
a valid USPA jumpmaster rating for a least one year, and complete an ICC.
Packer : One who has demonstrated
an high level of proficiency packing MAIN parachutes.
Rigger : A person who
has been properly trained to pack both main and Reserve parachutes. There
are two levels of demonstrated proficiency, the Senior rigger and the Master
TandemMaster : An individual
who has obtained certification from the USPA and a Tandem rig manufacturer
permits him / her to make tandem skydives with (attached to) another skydiver
or first time tandem jumper. Minimum requirements that must be met in order
to achieve this rating are a minimum of 500 skydives, 3 years in the sport
of skydiving, and have attended a tandem certification course.