CCAS | VFR Collision Avoidance
safe the sky
Free · Designed for iPad
CCAS is an aircraft collision avoidance system, especially used by VFR pilots. CCAS operates in lower airspaces, depending on the terrain, from ground level up to 5,000 ft above ground level (AGL).
- Safety Without Barriers -
We firmly believe that safety in general aviation should not be a question of cost. The CCAS network is entirely free of charge, funded by donations, and designed to be universally accessible. With a focus on functionality over "bling," it ensures that pilots of recreational aircraft can benefit from a reliable interoperable network for collision alerts. Our mission is simple: "see, BE SEEN, and avoid."
- How it works -
Each CCAS client periodically sends its own position to the CCAS network. On the other hand, the CCAS servers broadcast all relevant traffic around this position back to the CCAS client. By using standard TCP connections combined with a highly optimized protocol, this operates almost in real-time.
Besides other CCAS users, the server also broadcasts traffic information from different other sources, such as ADS-B, as well as OGN/FLARM, to ensure maximum traffic awareness.
You can easily connect CCAS to your navigation app (e.g. SkyDemon, Foreflight, VFRnav, ...). This means that traffic is displayed directly on the moving map. Traffic data is transmitted via GDL90. In addition, CCAS can be used as a proxy for other traffic data sources such as Stratux, FLARM or ADS-B receivers.
- How to use -
In order to use CCAS and help increase safety in the air, just download the official CCAS client app. It's completely free by the way!
Important note on privacy: No registration is necessary. Upon the first launch of the client, a random ID is generated on the device. Each position message is encrypted and shared only with other CCAS users in immediate proximity. No flight history is saved.
- How to contribute -
Simply use the client. Every pilot using CCAS makes an important contribution to make the airspace safe.
Ratings & Reviews
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We’re excited to bring you the latest version of CCAS. Your feedback matters – let’s make the skies even safer together!
What's new?
- optimized SkyDemon communication
- allow more than one own reg/hex value (separated by commas)
The developer, Hermann Hoelter, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Hermann Hoelter
- Size
- 60 MB
- Category
- Navigation
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Location
- This app may use your location even when it is not open, which can decrease device battery life.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2021-2025 CCAS Nonprofit Associations