The Safety Analysis and Risk Mitigation Process  Section 3  Table 3.3: Severity Table  39 3.5_SMSM_201904  Originally published April 2019  Uncontrolled copy when downloaded Hazard Severity Classification  Note: Severities related to ground-based effects apply to movement areas only.  Minimal  5  Minor  4  Major  3  Hazardous  2  Catastrophic 4 1  CONDITIONS RESULTING IN ANY ONE OF THE FOLLOWING: ATC  Services  A minimal  reduction in  ATC services  CAT D runway  incursion 1 Proximity  Event,  Operational  Deviation, or  measure of  compliance  greater than or  equal to 66  percent 2 Low Risk Analysis  Event severity, 3  two  or fewer indicators  fail  CAT C runway  incursion  Medium Risk  Analysis Event  severity, three  indicators fail  CAT B runway  incursion  High Risk Analysis  Event severity, four  indicators fail  CAT A runway  incursion  Ground collision 5 Mid-air collision  Controlled flight into  terrain or obstacles  Unmanned  Aircraft  Systems  Discomfort to  those on the  ground  Loss of  separation  leading to a  measure of  compliance  greater than or  equal to 66  percent  Low Risk Analysis  Event severity, two  or fewer indicators  fail Non-serious injury to  three or fewer people  on the ground  Medium Risk  Analysis Event  severity, three  indicators fail  Non-serious injury to  more than three  people on the ground  A reduced ability of  the crew to cope with  adverse operating  conditions to the  extent that there  would be a significant  reduction in safety  margins Manned aircraft  making an evasive  maneuver, but  proximity from  unmanned aircraft  remains greater than  500 feet  High Risk Analysis  Event severity, four  indicators fail  Incapacitation to  unmanned aircraft  system crew  Proximity of less than  500 feet to a manned  aircraft  Serious injury to  persons other than  the unmanned aircraft  System crew  A collision with a  manned aircraft  Fatality or fatal  injury to persons  other than the  unmanned aircraft  system crew 