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| 10 Codes |   |
| NASA Headquarters Security 10 codes | |
| code | description |
| 10-2 | Transmit/receive well |
| 10-4 | Acknowledge/OK |
| 10-6 | Busy |
| 10-7 | Out of service |
| 10-8 | In service |
| 10-9 | Repeat transmission |
| 10-12 | Stand by |
| 10-13 | Officer in trouble |
| 10-14 | Request a Supervisor at |
| 10-17 | Meet complainant at |
| 10-18 | Meet officer/Supervisor at |
| 10-19 | Return to _______ |
| 10-20 | Present location |
| 10-21 | Call by phone |
| 10-22 | Disregard |
| 10-23 | On scene |
| 10-24 | Assignment complete |
| 10-25 | Report in person to _______ |
| 10-31 | Suspicious person/circumstances |
| 10-36 | Time/date check |
| 10-44 | Leave assigned area/request relief |
| 10-46 | Citizen assist |
| 10-61 | In the area |
| 10-65 | On meal break |
| 10-66 | Call home next break |
| 10-74 | Negative |
| 10-85 | Report Number |
| 10-89 | Bomb threat at _______ |
| 10-93 | Investigating the area |
| 10-97 | Alarm at _______ |
| 10-99 | Subject barred from premises/wanted by police |
| 10-100 | Parking Meter |
| 10-400 | Begin random inspections |
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