The key SRU Terminology:

  • Scorpio: As it says, authorisation to use deadly force/to shoot
  • No Joy: Nothing/Not there/Unsuccessful
  • Twenty: Abbreviation of 10-20, police code for location/situation.[1]
  • Sierra One/Two: The code for the snipers.
  • Escalate/De-escalate: The situation is more tense/hostile or less tense/calm. Usually when the subject is escalating, it means he/she is getting ready to kill.
  • Solution: The target accurately acquired. "Have the solution" is more commonly used. This can be mentioned by a sniper or any of the team holding a weapon.
  • Stealth approach: Approach silently and cautiously so as not the let people esclate.


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