3D Lab
A whole load in 3D: the aircraft on jump run, each group out of the door, every jumper's orientation, the winds aloft, the breakoff and the openings. Pick a scenario, press play, then change the groups, the plan or the winds and watch what moves.
Scenario Pick one Change
Your dropzone, run from one place.
Coach is made by Stewart Systems, a business-systems studio in Wollongong, NSW, run by Christian Stewart, who has worked as a skydiving instructor. We build the tools on this site around your field: your landing areas, outs and hazards, your wind limits, your aircraft and your loads. Everything is built in your own Google or Microsoft account and handed over. It's yours to keep, and we don't host it.
The rule we build to: the system shows and flags. Anything that goes to customers or staff is drafted for a person to check and send, and nothing we build clears anyone to jump.
What we build
The 6am dropzone brief
One email before you open: today's call against your own limits, bookings by load, and ratings, repacks and AADs coming due.
Conditions board
Hourly jump calls on your own limits, with winds aloft to your exit altitude, on your phone.
Spot and load planner
Your field on a map, with exit order, gaps and canopy return for each load.
Visitor briefing
Your rules, landing areas and hazards, sent to visitors before they arrive.
Ratings and repacks
Instructor and tandem ratings, reserve repacks, AAD services, pilot and aircraft dates, flagged at 90, 60 and 30 days.
Operations app In development
Manifest, bookings, check-in, payments and the day's books in one place, built for dropzones. Ask about a trial.
How it grows
- Start: the 6am briefOne email each morning. Set up in one session.
- Then: the full officeJoined to the tools you already use, with your board on your phone.
- Later: connections, one at a timeBookings, manifest, roster and more, each added once the last has run cleanly for two weeks.
- Optional: CareA monthly check that everything still runs, fixes when your tools change, and a short written note.
Pick your kind of dropzone
Each one opens the request page with a suggested build already filled in. You can change any part of it.
Tandem-only, one turbine
Tandems all day from one aircraft, often a Caravan, where the hold-or-go call moves every booking.
Students and fun jumpers
Students, licensed jumpers and mixed loads, where exit order and briefings matter most.
Tandems plus sport
Tandems and fun jumpers side by side, often with more than one aircraft.
Boogies and events
Visiting jumpers, organisers and extra aircraft over a few days.
How it works
- A free 30-minute checkA call, or in person in the Illawarra. Within 48 hours you get a one-page map of how your day runs and where it leaks time.
- A one-page proposalUp to three options, each at a fixed price agreed in writing. No hourly rates.
- Build and test in your accountsOn your real field and data, tested with you before it's switched on.
- Training and handoverA walkthrough for your team, short videos and a one-page guide. Your records are yours to export at any time.
Coach itself stays free and isn't a sales page: these builds are how Stewart Systems pays for it. Builds use only what your dropzone gives us, and nothing here clears anyone to jump. stewart.systems
Tell us about your dropzone
The tools on this site, set up for your field: jump calls on your own limits, winds aloft to your exit altitude, spots and exit order for each load, a visitor brief in your words, and your ratings and repack dates in one place. Built in your own accounts and yours to keep.
Start from a suggested build
Pick the dropzone closest to yours and we lay out the whole build. Untick anything you don't want below.
Adjust the build
What we'll need from you
You don't need all of it to start. Nothing goes on your build that you haven't confirmed, and your own DZ brief always wins.
Ask for a build
Mostly
Your email to Stewart Systems
Send it to christian@stewart.systems. If the email button does nothing, copy the email and paste it into a new message.
What happens next
- A short call. Thirty minutes on the phone or video about how your days run.
- A one-page Snapshot. What we'd build, what we need, and what we'd leave out.
- A fixed price. A one-page proposal, or a straight answer if it isn't worth doing.
- Build and hand over. Set up in your accounts, checked with your staff, yours to keep.
Stewart Systems, Wollongong NSW · stewart.systems. Builds are planning and teaching tools: they never clear anyone to jump. The dropzone, the pilot and the jumper decide. The rest of Coach stays free.
The progression ladder
Nine stages, from a student's first track to multi-stage dynamic jumps and coaching new leaders. The ladder is the same everywhere. What changes by country is each step's gate, group size and who signs it off. Switch the rule pack to see it change.
Map: one group on a flat plan
Draw a movement jump on today's winds and watch where it opens, compared with a straight-down group from the same pass. Use it to teach why the flight path goes off jump run, how drift moves the opening point, and how long the next group should wait. These are teaching estimates, not a spot.
Debrief against the plan
Drop a FlySight file and its freefall is laid over the flight-plan board, aligned at the exit. You can see whether the group really turned off jump run and where it actually opened. None of the federation guides gives a debrief procedure, and no tool we found overlays the jump on the briefed plan. This tab is the gap.
Drop a FlySight CSV here
FlySight 1 or FlySight 2 TRACK.CSV · read in your browser, never uploaded
The example is made up. It flies 20° off the plan at 85% pace, so you can see what a miss looks like.
Glide over the freefall
What coaches teach
How the people who run movement programmes sequence, brief and debrief, going by their own published material. Nearly all of them use the same ladder. Where they differ is in how they brief and how little anyone formalises the debrief.
Where coaches say it's hard
Sources
Every source Coach cites, numbered. Numbers in brackets on each card point here. Speeds and drift on the Map and Movement pages are estimates built on these figures. Manuals change every year, so check the current edition.