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10 Codes  |
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| National Park Service Codes | |
| code | description |
| 10-0 | Caution |
| 10-1 | Signal weak |
| 10-2 | Signal good |
| 10-3 | Stop transmitting |
| 10-4 | Acknowledge |
| 10-5 | Relay |
| 10-6 | Busy - unless urgent |
| 10-7 | Out of service |
| 10-8 | In service |
| 10-9 | Repeat |
| 10-10 | Fight in progress |
| 10-11 | Dog problem |
| 10-12 | Stand by |
| 10-13 | Weather report |
| 10-14 | Prowler |
| 10-15 | Civil disturbance |
| 10-17 | Meet complainant |
| 10-18 | Urgent |
| 10-19 | Return to... |
| 10-20 | Location |
| 10-21 | Call...by landline |
| 10-22 | Disregard |
| 10-23 | Arrived at location |
| 10-24 | Assignment completed |
| 10-25 | Report to... |
| 10-26 | Rush - detaining subject |
| 10-27 | License/permit information |
| 10-28 | Registration information |
| 10-29 | Check for wants |
| 10-31 | Crime in progress |
| 10-32 | Man with gun |
| 10-33 | Emergency |
| 10-34 | Riot |
| 10-35 | Major crime alert |
| 10-36 | Time check |
| 10-37 | Suspicious vehicle |
| 10-38 | Stopping vehicle |
| 10-39 | Use lights/siren |
| 10-40 | No lights/siren |
| 10-41 | Beginning shift |
| 10-42 | Ending shift |
| 10-44 | Permission to leave |
| 10-45 | Animal carcass at... |
| 10-46 | Assisting motorist |
| 10-47 | Emergency road aid at... |
| 10-50 | Accident (PI - with injuries/PD - property damage/F - with fatality) |
| 10-51 | Wrecker needed |
| 10-52 | Ambulance needed |
| 10-53 | Roadblock (at...) |
| 10-55 | Drunk driver |
| 10-56 | Drunk |
| 10-57 | Hit and run |
| 10-58 | Direct traffic |
| 10-63 | Prepare to copy |
| 10-66 | Message cancelled |
| 10-69 | Message received |
| 10-70 | Fire alarm |
| 10-71 | Nature of fire? |
| 10-72 | Fire - progress report |
| 10-76 | Enroute to... |
| 10-77 | E.T.A. |
| 10-78 | Need assistance |
| 10-80 | In pursuit |
| 10-85 | Delayed (due to...) |
| 10-91 | Pick up prisoner |
| 10-92 | Illegally parked vehicle |
| 10-93 | Blockade |
| 10-95 | Suspect in custody |
| 10-96 | Mental case |
| 10-97 | Radio check |
| 10-99 | Wanted/stolen |
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