Open Source Acknowledgements

Last Updated: September 2, 2026

See The Bravo is built on the work of many open source projects. This page records the components that carry licence obligations we owe to you, and gives you the downloads those licences entitle you to.

1. Aircraft 3D models (GPL-2.0)

The aircraft shapes shown for nearby traffic in the immersive view are taken from the Flightradar24 3D models repository, itself largely derived from aircraft created by the FlightGear community, and from FlightGear's own FGAddon aircraft hangar (Subversion revision 21578): thirty aircraft the Flightradar24 set does not cover, including twelve helicopters, eleven military types and the Boeing 737 classics. Fourteen of them — among them the Bell 206 JetRanger, the UH-1, the UH-60 Black Hawk, the Sikorsky S-92, the Eurocopter Dauphin and EC130, the Robinson R44 and both 737 classics — are by Emmanuel Baranger (helijah); the Pilatus PC-12, Cirrus SR22T and HK36 Super Dimona are by Bea Wolf (D-ECHO); the Cessna 182S is by Heiko Schulz, Gilberto Agostinho, Benedikt Hallinger and contributors; the 737-300 also carries work by Innis Cunningham, David Culp, Jarvum, e-pilot, Skyop and Soitanen; the Robinson R22 is by Sylvain Cabaniols and contributors; and the EC135, Bo 105, S-76, CH-47, C-130, KC-135, E-3, F-16, F-15, F/A-18, A-10, V-22, T-38, F-22 and F-35 are by their respective FlightGear contributor teams. Each is GPL-2.0 or, where its author says so, GPL-2.0-or-later. The individual authors of every model are credited in the projects' source folders and commit history, and in the credits file inside our source archive; our thanks to all of them, and to Flightradar24 and the FlightGear project for curating and publishing the sets.

One model is not GPL: the Cirrus Vision SF50 is based on “cirrus vision Sf50” by hilos run, licensed under CC BY 4.0, and is used with attribution; its licence file is included in the source archive.

Copyright remains with the original authors. The models are distributed under the GNU General Public License, version 2, and you may copy, modify and redistribute them under its terms. They are not part of the app you install from the App Store: the app downloads them from See The Bravo's own servers after installation, so your rights in them are exactly those the GPL grants. A copy of the licence accompanies every download below and is also available on its own:

Our modifications

To render efficiently on Apple Vision Pro we converted each model from glTF or AC3D to USDZ, merged its meshes into a single mesh (holding propellers and rotors out as their own parts so they can turn), reduced it to roughly 6,000 vertices, downscaled its textures to 1024 pixels (the upstream house livery is kept), and normalised its orientation and scale. Those modified files, and the exact scripts that produce them, are released under the same GPL-2.0 licence.

Complete corresponding source

As required by section 3 of the GPL, the complete corresponding source for the models the app downloads is available from us directly. The archive contains the original glTF and AC3D files and their Blender sources, our converted USDZ files, the conversion scripts, a per-aircraft credits file, and the licences:

If a link above is unavailable, or you would like the source on physical media, write to us using the contact details below and we will provide it at no more than the cost of distribution, for as long as we distribute the models.

2. Airline and operator liveries (GPL-2.0)

Aircraft are shown in the colours of the airline operating them. Those paints come from the FlightGear livery database, where they were contributed by individual painters and released under the GNU General Public License, version 2. The models we use are FlightGear imports that kept the upstream texture layout, so a livery painted for the FlightGear aircraft fits ours unchanged.

Military aircraft come from somewhere else again. Air-force paints are not in the livery database; they ship inside the FGAddon aircraft themselves, in each aircraft's Models/Liveries/ directory, painted largely by Emmanuel Baranger, Detlef Faber and Gary Brown, and released under the GPL, version 2 or later. Those are the paints behind the C-130s, Chinooks, Black Hawks, Dauphins, Ospreys, Sentries, King Airs, JetRangers, Hueys, S-76s and F-35s in the air forces and coast guards of some twenty countries.

Every livery names its painter, and that credit travels with the file: it is recorded against each livery in the manifest the app reads, shown in the app's licences screen, and listed per aircraft and per airline in the credits file inside the livery archive below. Our thanks to all of them, and to the maintainers of the livery database for collecting and publishing the work.

Neither See The Bravo nor FlightGear is affiliated with any airline, armed force or government agency. Airline names, logos, liveries and national insignia are the property of their respective owners and appear here only to identify the real aircraft being shown.

Our modifications

Each livery is resized to the texture size of the model it is painted on and saved as JPEG. One livery is not harvested but composited by us: the VC-25A presidential aircraft, for which no freely licensed paint exists. It is built from the island geometry of an existing GPL-2.0 livery and is therefore GPL-2.0 itself, credited to that livery's painter in the manifest and in the credits file. The resizing and compositing scripts are released under the same licence.

Complete corresponding source

For a resized JPEG the corresponding form for modification is the painter's original, as they packaged it. The archive holds those originals for every livery we distribute — from the livery database and from inside the FGAddon aircraft alike — the scripts that transform them, and a credits file naming each painter:

The same offer applies as for the models: if a link is unavailable, or you would prefer it on physical media, write to us and we will provide it at no more than the cost of distribution, for as long as we distribute the liveries.

3. How the models reach your device

The App Store build of See The Bravo contains no GPL-licensed material. When the immersive view first needs the shape of a nearby aircraft type, the app requests that model from See The Bravo's servers and caches it on your device, and fetches its operator's livery the same way. No Apple usage rules or digital rights management apply to those files; your rights in them are exactly those granted by the GPL.

4. Contact

Questions about licensing, source availability, or attribution can be sent through our contact page.