> ## Documentation Index > Fetch the complete documentation index at: https://ftp.legacydoc.xyz/llms.txt > Use this file to discover all available pages before exploring further. # 1.3 - 10 Codes Within the FTP division, it is VITAL that you know and understand all the 10-codes required of you. You will need to know these as you will be expected to confidently teach new cadets these, alongside our SOPs.  It is strongly recommended that you are familiar with your 10-codes before applying to the FTP division. You should know these codes and you MUST know, and be confident in teaching to recruits. No exceptions.
| Code | Meaning | Code | Meaning | | :----- | :------------------------ | :----- | :-------------------------- | | Code 0 | Game Crash | Code 4 | All Clear | | 10-1 | Unable to Copy | 10-23 | Arrived on Scene | | 10-2 | Loud and Clear | 10-25 | Report in person | | 10-3 | Tactical Communication | 10-41 | On Duty | | 10-4 | Acknowledgement | 10-42 | Off Duty | | 10-5 | Relay | 10-43 | Mental Patient | | 10-6 | Busy, Unless Urgent | 10-47 | Injured Person | | 10-7 | Out of Service | 10-50 | Vehicle Accident/Collision | | 10-8 | In Service | 10-52 | Police Required | | 10-9 | Repeat | 10-71 | Active Shooting | | 10-10 | Negative | 10-72 | Hostage Situation | | 10-13 | Shots Fired | 10-76 | Enroute | | 10-14 | Officer or Medic Injured | 10-77 | Need Backup (Non-Emergency) | | 10-15 | Inmate | 10-78 | Need Backup (Emergency) | | 10-19 | Enroute to Station/Prison | 10-79 | ETA | | 10-20 | Location | 10-91 | Transport Unit | | 10-22 | Disregard | 10-99 | Officer in Distress |