From: horn@tegan.jsc.nasa.gov (Mark Horn)
Subject: Re: F A Q (Instructor Aided Deployments?)
Keywords: IAD First
Organization: NASA Johnson Space Center
Date: Wed, 16 Dec 1992 05:25:37 GMT

In article <1992Dec16.003504.3135@nstn.ns.ca> scrutton@Predator.Ocean.Dal.CA (J
eff Scrutton) writes:
>I was told recently that Canada is the only place that does IADs and was
>just wondering if this is true. 

Nope.  It's false.  There are a few places that do it in the US.  I know of
two places that are USPA Group Members.  They require a waiver with USPA to
allow them to do it.  I've heard that there are some non-USPA DZ's that are
doing it...they, of course, don't require a waiver from USPA.

One of these DZ's is where I learned.  In fact, I'm a IAD rated JM.

>This is roughly like S/L except the JM's
>job is to pull out your pilot chute and bridle on jump run and throw it
>after you when you exit (no bonus points for catching it)

Actually, it's a bit more complicated than that, but that's the basic jist.
In fact, what the JM has to do (at least in a Cessna) is climb out with the
student to garrantee that the pilot chute stays behind the students back until
they release from the strut.  When the student has released, the JM throws the
pilot chute and main deployment begins.  

As far as catching the pilot chute, I'll address that in a minute.

>I can't remember if they called this a poised or dynamic exit but the
>sequence for the IAD is left hand on strut, right hand on rear door jamb,
>left foot on step, right leg pulled up with foot on rear jamb, swing butt
>under right forearm and square to the wind... sidestep and "Arch thousand..."

Holy Mackeral!  That isn't the sequence that we used.  Our sequence went
something like:

<Student sitting facing forward in a Cessna 182>
JM:	Ok, we're coming up on jump run, let's get you up on your knees
	<JM takes pilot chute out of pocket and shows it to student>
	Here's your pilot chute.
Stud:	You've got my pilot chute?
JM:	Yes - here it is.
JM:	Door! <JM opens door>
JM:	Ok, stand by.
	<Student puts left hand on upper left door jam, right hand on lower
	right door jam, and right foot on step.>
JM:	Ok, climb out.  Left hand first.
	<Student puts left hand on strut, then right hand on strut, then puts
	left foot on step.  Student slides out to the end of the strut, and
	gently takes feet off of step.  Student is now hanging in wind.
	During all this JM is climbing out with student - making sure to keep
	pilot chute behind students back and not allowing too much bridle to
	catch prop blast.>
Stud:	Check In!
JM:	Skydive!
	<Student releases fingers from strut.  JM throws pilot chute - main
	deployment>

This put the student in very good body position before he/she released from
the airplane.  Also, if the JM makes sure to wait until the student releases
to throw the pilot chute, instead of trying to guess when the student will
release, it is virtually IMPOSSIBLE for the student to catch the pilot chute.

>I think the exit reduces refusals, it's pretty hard to get back in when
>you're all twisted up like that :-)

Well, the way we did it required that the student leave the airplane after
they've started climbing out.  You can imagine how difficult it would be to
get the student back in the airplane with his/her pilot chute occupying one of
your working hands.  Any time before the climb out command, the student could
refuse if he/she wanted.

>Do any other places (not in Canada) do this?

The place that I learned to jump and got my rating at was in Madison, WI - the
place was called Seven Hills.  It's a really nice little DZ.  I really miss
jumping there!  

I like IAD.  I've only seen S/L a couple of times.  I've also had the
oppurtunity to demonstrate IAD to a few S/L JM's who came up and visited our
DZ to see our system.  They mentioned that it requires a lot more
responsibility out of the JM than the S/L system does.  I wish more places did
IAD.  I really liked that system and I'm not really looking forward to all the
intracacies of handling a static line.  Maybe it's time to think about AFF...

Blue Skies,
--
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