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Small UAS Detect and Avoid Requirements for Limited Beyond Visual Line of Sight (BVLOS) Operations – Separation Requirements and Testing

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Small UAS Detect and Avoid Requirements for Limited Beyond Visual Line of Sight (BVLOS) Operations – Separation Requirements and Testing Photo


A core rule of manned aviation is very concise - detection, see and avoid. Unmanned Aircraft Systems (UAS) do not have the luxury of a pilot in the cockpit to see and safely avoid nearby traffic. The current solutions are to either place visual observers on the ground or use a chase plane. This limits the potential of Small UAS (sUAS) in areas such as precision agriculture, crop and wildlife monitoring, search and rescue, and linear infrastructure inspection due to safety concerns and access constraints for visual observers and chase planes.

Beyond Visual Line of Sight operations with the use of Detect and Avoid (DAA) technology resolves this issue. Groups are currently developing standards and rules for DAA that allow BLVOS operations. This follow-on work builds on our previous efforts to inform FAA regulations and industry standards addressing DAA and BVLOS operations.

This ASSURE team:

  • Has developed an operational framework for sUAS BVLOS operations.
  • Has developed a separation framework.
  • Is developing and testing methods for evaluating DAA systems.

Project Lead
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Mark Askelson
Exec. Director | Res. Inst. for Autonomous Systems (RIAS)
Associate Dean of Research | John D. Odegard School of Aerospace Sciences