Which hazard category corresponds to the risk of mission failure, death, or permanent total disability?

• A. Catastrophic
• B. Critical
• C. Marginal
• D. Negligible

Answer: (A)

Hazard severity is ranked in levels from least to most severe, with catastrophic representing the most severe outcomes. This category covers scenarios where the consequence is mission failure, death, or permanent total disability. The described risk—death or permanent disability—fits this top level because it implies irreversible, life-altering outcomes and the complete loss of the mission capability.

In contrast, critical covers severe injuries or significant mission impact that are serious but not fatal or permanently disabling, marginal covers minor injuries or disruptions, and negligible covers minimal or no impact. So the scenario aligns with catastrophic, the highest severity level.