What does ALoS stand for?

What does ALoS stand for?

• A. Acceptable Level of Safety
• B. Acceptable Level of Security
• C. Acceptable Level of Service
• D. Acceptable Level of Assurance

Answer: (A)

Acceptable Level of Safety is the threshold used to judge whether a UAS operation is safe enough to proceed after applying risk controls. It defines the maximum level of residual risk that is considered tolerable given the mission benefits and the mitigations in place. The process is to identify hazards, estimate risk, implement controls to reduce that risk, and then compare the remaining risk to this threshold. If the residual risk is at or below the Acceptable Level of Safety, the operation is deemed acceptably safe; if it’s above, you need more mitigation, a different flight plan, or to cancel. This concept is different from terms like level of service, which relates to operational efficiency or capacity, not safety risk, and from security or assurance phrases that do not describe a safety risk threshold. For example, in planning a flight over a populated area, you’d apply mitigations such as geo-fencing, pilot competency requirements, and contingency procedures so that the remaining risk is within the Acceptable Level of Safety.

Acceptable Level of Safety is the threshold used to judge whether a UAS operation is safe enough to proceed after applying risk controls. It defines the maximum level of residual risk that is considered tolerable given the mission benefits and the mitigations in place. The process is to identify hazards, estimate risk, implement controls to reduce that risk, and then compare the remaining risk to this threshold. If the residual risk is at or below the Acceptable Level of Safety, the operation is deemed acceptably safe; if it’s above, you need more mitigation, a different flight plan, or to cancel.

This concept is different from terms like level of service, which relates to operational efficiency or capacity, not safety risk, and from security or assurance phrases that do not describe a safety risk threshold. For example, in planning a flight over a populated area, you’d apply mitigations such as geo-fencing, pilot competency requirements, and contingency procedures so that the remaining risk is within the Acceptable Level of Safety.