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Task 13.3 - Selection of SAIL and identification of OSO

This assignment guides the group through how to find the right Specific Assurance and Integrity Level (SAIL) value and associated Operational Security Objectives (OSOs).

 

Learning objectives:

  • Understand how final GRC and residual ARC determine SAIL value.
  • Identify increasing requirements for OSO depending on SAIL level.
  • Understand what resilience means in the context of OSO.
  • Appreciate the importance of a "Safety Portfolio" that documents compliance.

 

Equipment:

  • Printouts of relevant tables: Inherent Ground Risk, Ground Risk Measures, Airspace ARC Model, and SAIL Determination Table.
  • Paper and markers/pencils.
  • Access to the SORA document (digital or paper) for details about OSO.

 

Instructions:

Define a new scenario:

  • Create a new hypothetical scenario for a drone operation (different from the previous task).
  • Make it a bit complex to be able to discuss multiple measures.

Examples:

  • Pipeline monitoring over varied terrain and buildings.
  • Emergency relief drone after natural disaster in urban area.
  • Describe the drone (type, size, weight) and operation (VLOS/BVLOS, altitude, overflight of which areas).

Calculate inherent GRC and initial ARC:

  • Use the tables to calculate inherent risk for ground and airspace.
  • Discuss what contributes to the level of risk.

 

Apply measures and determine final GRC and residual ARC:

  • Brainstorm and select realistic strategic measures (M1 and M2) for ground risk and ARC.
  • Use the tables to find new GRC and ARC after action.
  • If the GRC is still high, discuss whether it requires moving into the "certified category".
  • Discuss what the measures require in terms of effort and cost in practice.

 

Determine the SAIL and identify the OSO:

  • Find the correct SAIL value based on final GRC and residual ARC.
  • Discuss what this value says about the requirements for the operation.
  • Review the OSO categories (liability, drones, systems, human factors, weather).

For each category:

Identify two specific requirements that apply to your SAIL level and discuss the required robustness (low, medium, high).