Ty Zellers as Jumpmaster
Not only does he carry Jumpmaster License he also did some NAVY work, the
U.S. Navy SEAL way in ST2! As part of his military training he was handy at
parachuting and joined an Elite Jumping Team.  

Here are quotes regarding his background and Parachuting Jumpmaster qualifications:

"As a sport parachutist for 34 years (and counting) I have approximately 3000 jumps
(including military); 12 Hour Gold Freefall Wings; 24 Hour Diamond Freefall Wings; 
1,000 Jump Gold Wings; 2,000 Jump Diamond Wings; as well as my Jumpmaster, 
Instructor, Senior Parachute Rigger, and Private Pilot's License."

These are some quotes from Ty on his Navy Jumping Experiences:

"Some of the best years (7-1/2) of my life were spent on the East and West
Coast Navy Parachute Demonstration Teams. They actually paid me to do
what I loved best!"

"I joined the Navy at age 17 after graduating from Palmyra H.S., PA in 1962,
and went to Aviation Electronics Navigation Technician School before being
assigned to my 1st duty station at NAS in Oceana, Virginia. It was a stroke of
luck I didn't come to realize until about 6 mos. later.   Oceana was a very isolated
base and there was a lack of things to occupy spare time.  As I looked out the 
barracks window on a boring Saturday afternoon, I saw what looked like parachutes
descending in the distance. After I muttered, "Wow, that looks neat", a voice behind
me said, 'Those are the skydivers from the Navy parachute club on the other side of 
the base.  I can introduce you to one of them that sleeps only a few bunks down from
you?'  The guy took me to one of the club meetings at the Tidewater Navy Skydivers
and so began a lifelong career of parachuting.  It took a couple weeks to be trained
then and all the parachutes (main and reserve) were military surplus equipment, 
which had expired their "shelf-life  expectancy". 
It didn't take long to discover 90% of all the club members were from UDT 
(Underwater Demolition Team) or the newly formed Navy group called SEALs!! 
My 1st static line jump was in October 1963 and it didn't take long to know this was
something I was going to do for a very long time. I don't remember much about the
first 5 static line jumps except the total silence and beautiful view after the parachute
opened. The Twin Beachcraft (TC-45J) flew at over 100 mph. The side door was very
small.  Squeezing myself out the door was no easy task, but things happened fast
afterwards."

Here are more Quotes from Ty regarding parachuting:

"Before the advent of sport parachute manufacturers the standard canopies were 
28 ft. round and their only forward speed was derived by "drive slots" that were 
nothing more than cut out material from the rear part of the canopy. For steering,
we simply cut out additional material from opposite sides of the drive slots, and
attached a piece of suspension line to the original suspension line passing on the
outside side of the steering hole. Anything from wooden dowels to broken tooth
brushes were fastened to the steering lines. By simply pulling down on the steering
line it partially closed the steering hole on the side to which you wanted to turn, thus
allowing more air to flow out of the opposite side and to make a slow turn."

"Facing into the wind was a must for 28 ft. chutes, and pulling down on both steering
lines at the same time had little more affect than to slow your forward speed a bit. 
The reserve was clipped to the front of the jumper on "D-rings" much the same 
as the military combat jumpers. We made our own "sleeves" to pull down over 
the canopies before putting them into the backpack containers to slow down the 
opening shock. At terminal velocity (approx. 120 mph), a parachute would open
almost instantaneously, thus causing serious damage to jumper and canopy alike
without this device." 

"Reserves had no such opening shock inhibitor and my couple of malfunctions at
terminal speed almost rendered me unconscious.  I had no idea that I was one of 
the forerunners to the sport of skydiving.  All I knew was that it was tremendously
exciting, and I hung on every word uttered by other experienced jumpers. With a 
grand total of 25 freefalls I was a designated jumpmaster for the club, and only
a few jumps away from being an instructor. Anyone with a "D" license (200+jumps)
was looked upon as a great authoritarian of this fledgling sport." 

"In the 60's all doors of jump airplanes had to be removed according to the dictates
of the FAA (Federal Aviation Administration). That made for some bone chilling
rides to 12,000 ft. (and over), as there was no specially designed clothing other
than bulky coats, ski gloves, and high top boots we were able to procure on an
individual basis. Being numb from the cold was acceptable if you wanted to play
the game and frostbite was not totally uncommon." 

"Bone bruising/breaking landings, extreme temperatures, and constant experimentation
with equipment that wasn't designed for saving your life more than once was probably
not the precise definition for "sport" parachuting, but I knew from the beginning.
I was running with the right crowd, because they seemed to thrive on it. They "ate it
up with a spoon"; they couldn't get enough of it!  Their enthusiasm was unknowingly
infectious and I lived just for the weekends to meet my newfound good friends and
share in their hard-charging "devil may care" adventures. As weeks and months 
passed, I found myself being accepted by them and wanting more and more to
be one of them.  Food, sleep, and the opposite sex had to play second fiddle to 
jumping out of what most people called perfectly good airplanes and having 
Frogmen and SEALs for friends."

Here is a quote from Ty regarding his Training as a SEAL:
"Class #37...East Coast. Graduated Aug 66 as an AT3"