SAIL I & SAIL II

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How UAV Navigation-Grupo Oesía helps you

• Limited Design-Related OSOs Applicable: According with new version of SORA v2.5, low-risk operations under SAIL I and SAIL II are required to comply with a limited number of design-related OSOs under a low level of robustness. These types of operations do not require a specific certification process; instead, the applicant declares that the required level of integrity has been achieved.
• Safety Features Covered: Our flight control system has been designed for advanced and high-risk operations; therefore, it inherently provides all the required capabilities to support SAIL I and SAIL II operations, including:
  • Deterministic operation
  • Geofencing & Geocaging capabilities
  • Automatic SAFE mode with return-to-base functionality
  • Fail-safe systems to ensure mission continuation in case of system failures
  • Altitude protection
  • Configurable behaviors in case of communication loss: autonomous preconfigured operation or automatic return to base
  • Flight termination and advanced emergency procedures
  • ...among many others.
• Supporting Documentation: To support regulatory submissions, UAV Navigation-Grupo Oesía can accompany the platform manufacturer and provide dedicated SAIL I & II technical documentation and validation artifacts that demonstrate safe operation in accordance with SORA specifications.

SAIL III

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How UAV Navigation-Grupo Oesía helps you

• Compliance with EASA Design-Related OSOs: Our flight control system complies with the EASA OSOs applicable to the Flight Control System, including OSOs #5, #6, #18, #19/20 and #24. Building on the functionalities already validated for SAIL I and SAIL II, the design is reinforced through advanced fault-management logic and safety-enhancing functionalities.
• System Safety and Reliability: The system is designed according to the principles of fault tolerance to mitigate the risk of loss of control. To prove this, the reliability and robustness of the system have been verified by independent third parties through FMECA, RPR and FTA analyses, confirming a mission loss probability of 1.809E-05 per flight hour (MTBF over 19,500 hours).
• Robust data link Communications: Our system continuously monitors the communications status in real time and activates automatic contingency mechanisms, such as return-to-home, in the event of a failure. In addition, the system supports a redundant data link to ensure communications continuity.
• Automatic Flight-Envelope Protection: The system integrates automatic flight-envelope protection algorithms, advanced fault-handling logic, and autonomous management of contingencies, including integrated and automatically executable FTS.
• Advanced GCS Software: Our GCS software, Visionair, provides high operator situational awareness through clear ADS-B traffic visualization, prominent alerts, intuitive mission displays, and 3D model views. Its predictive path tools help anticipate emergency actions, while automated flight control reduces operator workload.
• Robust Hardware with MIL-STD-810F and 461F Certifications: Hardware certified under MIL-STD standards that ensure its performance in extreme environmental conditions and tested against electromagnetic interference and compatibility (EMI/EMC).
• Certification Support already validated in previous processes: Specific life-cycle data items in accordance with DO-178B and DO-254, together with the corresponding FHA supporting documentation, can be provided as evidence of software and hardware development assurance. The processes and evidence we provide have been validated through the successful acceptance of certifications achieved by some of our customers, such as SAIL III, LUC for Fixed Wing and Rotary Wing platforms and STANAG 4703 or STANAG 4738.

SAIL IV

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How UAV Navigation-Grupo Oesía helps you

• Compliance with EASA SC Light-UAS: As an extension of what is described for lower SAIL levels, our system is adapted to comply with EASA SC requirements Light-UAS.2510 and Light-UAS.2511, in accordance with the Design Verification Process mandated by EASA for SAIL IV operations.
• Redundant, modular, scalable and fault-tolerant control architectures: The proposed architectures are based on dual FCCs and a triply redundant navigation system that integrates the internal AHRS/INS units of the autopilots, together with a third external and independent AHRS/INS. This system is designed to provide full redundancy of the guidance, navigation and control functions, as well as to maintain aircraft control even in the event of critical failures.
• Dissimilar Software: The system uses a dissimilar software architecture between the FCCs. The primary FCC provides full operational capabilities, while the secondary FCC is dedicated to monitoring and only taking control to safely complete the mission if needed. This separation enhances fault tolerance and ensures that critical functions are handled independently, increasing overall system reliability.
• Documental Support for DVR: Similarly to SAIL III, supporting documentation according to DO-178B and DO-254 can be provided as evidence of software and hardware development assurance, together with the corresponding FHA supporting documentation. In addition, given the higher documentation required in SAIL IV, the company will support UAS manufacturers throughout all stages of the design process, ensuring that the system meets the safety objectives and that coordination with EASA is smooth and efficient.