ANN
ARUNDEL COUNTY POLICE DEPARTMENT
BALTIMORE
COUNTY FIRE CODES & SIGNALS
BALTIMORE
COUNTY POLICE CODES & SIGNALS
DEPARTMENT
OF TRANSPORTATION CODES
HOWARD
COUNTY POLICE DEPARTMENT
HOWARD COUNTY
POLICE DISPATCH CODES
MARYLAND
STATE POLICE RADIO CODES & SIGNALS
MONTGOMERY
COUNTY POLICE
PRINCE
GEORGES COUNTY POLICE DEPARTMENT RADIO CODES & SIGNALS
MILITARY POLICE CODES
ANN ARUNDEL COUNTY POLICE DEPARTMENT: 10-0 Caution 10-50 Accident (F,PI,PD) 10-1 Unable Copy-Change Location 10-51 Tow Truck Needed 10-2 Signal Good 10-52 Ambulance Needed 10-3 Stop Transmitting 10-53 Road Blocked At ____ 10-4 Acknowledgment (ok) 10-54 Livestock On Highway 10-5 Relay 10-55 Intoxicated Driver 10-6 Busy--Unless Urgent 10-56 Intoxicated Pedestrian 10-7 Out Of Service 10-57 Hit & Run (F,PI,PD) 10-8 In Service 10-58 Direct Traffic 10-9 Repeat 10-59 Convoy Or Escort 10-10 Fight In Progress 10-60 Squad In Vicinity 10-11 Dog Case 10-61 Personnel In Area 10-12 Stand By (stop) 10-62 Reply To Message 10-13 Weather--Road Report 10-63 Prepare Make Written Copy 10-14 Prowler Report 10-64 Message For Local Delivery 10-15 Civil Disturbance 10-65 Not Message Assignment 10-16 Domestic Problem 10-66 Message Cancellation 10-17 Meet Complainant 10-67 Clear For Net Message 10-18 Quickly 10-68 Dispatch Information 10-19 Return To _____ 10-69 Message Received 10-20 Location 10-70 Fire Alarm 10-21 Call _____ By Telephone 10-71 Advise Nature Of Fire 10-22 Disregard 10-72 Report Progress Of Fire 10-23 Arrived At Scene 10-73 Smoke Report 10-24 Assignment Completed 10-74 Negative 10-25 Report In Person (meet) 10-75 In Contact With______ 10-26 Detaining Subject, Expedite 10-76 En Route 10-27 Drivers license Information 10-77 ETA (estimated time arrival) 10-28 Vehicle Registration Info. 10-78 Need Assistance 10-29 Check For Wanted 10-79 Notify Coroner 10-30 Unnecessary Use Of Radio 10-80 Chase In Progress 10-31 Crime In Progress 10-81 Breathalyzer Report 10-32 Man With Gun 10-82 Reserve Lodging 10-33 EMERGENCY 10-83 Work School Crossing At ____ 10-34 Riot 10-84 If Meeting __- Advise E 10-35 Major Crime Alert 10-85 Delayed Due To _____ 10-36 Correct Time 10-86 Officer/Operator On Duty 10-37 Investigate Suspicious Car 10-87 Pickup/Distribute Checks 10-38 Stopping Suspicious Car 10-88 Present Telephone # Of 10-39 Urgent---Use Lights/Siren 10-89 Bomb Threat 10-40 Silent Run---No Lights/Siren 10-90 Bank Alarm At _____ 10-41 Beginning Tour Of Duty 10-91 Pick Up Prisoner/Subject 10-42 Ending Tour Of Duty 10-92 Improperly Parked Vehicle 10-43 Information 10-93 Blockade 10-44 Permission To Leave 10-94 Drag Racing 10-45 Animal Carcass At ____ 10-95 Prisoner/Subject In Custody 10-46 Assist Motorist 10-96 Mental Subject 10-47 Emergency Road Repair At__ 10-97 Check (test) Signal 10-48 Traffic Standard Repair 10-98 Prison/Jail Break 10-49 Traffic Light Out At__ 10-99 Wanted/Stolen Indicated
BALTIMORE COUNTY POLICE CODES & SIGNALS:
KGA Replaces Headquarters Or Radio
10-1 Transmission Check
10-2 Signals Good
10-3 Signals Poor
10-4 Acknowledgement
10-5 Failed To Acknowledge
10-6 Stand-By, Busy, Unless Urgent
10-7 Out Of Service-Give 10-20
10-8 In Service
10-9 Repeat
10-11 Meet ___ At _____
10-12 Not Available
Signal 13 ---ASSIST AN OFFICER--- Preceded By An Alert Tone
10-14 Wagon Run
10-15 Urgent Wagon Run
10-16 Back Up Unit ______
10-17 Call Whatever You Are Assigned To
10-18 Go Into Whatever You Are Assigned To
10-19 Return To _____
10-20 Location
10-21 Call ____(somewhere other than 10-17)
10-22 Disregard
10-23 Arrived At Scene
10-25 Stopping Suspicious Vehicle Give 10-20, License Number Etc.
10-26 Request To Change To City Wide Frequency
10-27 Driver's License Information
10-28 Vehicle Registration Information
10-29 Check Records For Wanted
10-30 Person Or Vehicle Is Wanted, Use Caution
10-31 Crime In Progress
10-32 Sufficient Units On The Scene, Return To Posts
10-33 Emergency
10-34 Major Civil Disturbance In Progress
10-35 Major Crime Alert
10-36 Stand By Copy Description
10-37 Requesting A Tow Truck
10-38 Requesting An Ambulance (responding advise)
10-39 Disable Departmental Vehicle, Give 10-20 and Vehicle Number
10-40 Request Crime Laboratory
10-41 Request Impound Truck
10-42 Request Animal Shelter
10-43 Malfunctioning Traffic Signals:
A--Signal Completely Out
B--Red Signal Out
C--Signal Sticking
D--Stop Sign or Yield Sign Down or Missing
10-44 Request Permission To Patrol On Foot, Try Up, Lunch
10-45 Permission Denied
10-46 Permission Granted
10-47 Negative
10-48 Positive
10-49 Hourly Call----Give 10-20
BALTIMORE COUNTY POLICE CODES: Investigative: A1 Accidental Death A25 Loitering Complaint A2 Alarm, Accidental A26 Malicious Burning A3 Alarm, Weather Malfunction A27 Mental Subject A4 Alarm, Faulty A28 Emergency Commitment A5 Alarm, Misuse A29 Narcotics A6 Anonymous Calls, Telephone A30 Neighbor Complaint A7 Arson A31 Open Door Or Window A8 Bomb Threat A32 Possession Of A Deadly Weapon A9 Bombing A33 Road Defects/Hazardous A11 Destruction Of Property A34 Sudden Death A12 Disturbance A35 Suicide A13 Escapes & AWOLS A36 Suicide, Attempt A14 Fires, Suspicious A37 Suspicious Suspect A15 Fires, Other A38 Tampering With Food A16 Gambling & Booking A39 Trespassing A17 Gambling Numbers & Lotto A40 Unknown Trouble A18 Gambling Other A41 Field Interview A19 Prostitution A42 Expired Patient A20 Hunters A43 Toxic Waste Spilt A21 Discharging Firearms A44 Overdose A23 Liquor Law Violation A45 Home Improvement Violation A24 Liquor, Open Container A49 Alarm, Civil Citation
Domestic: B1 Abduction B8 Kidnapping B2 Child Abduction/Stealing B9 Minors In Possession B3 Child Abuse B10 Missing Adult B4 Child Neglect B11 Missing Child B5 Custody Dispute B12 Missing Adult Returned B6 Domestic B13 Missing Child Returned B7 Juvenile Complaint B14 Domestic-Spousal Assault
Accidents: C1 Auto Accident-Property Damage C10 Construction Accident C2 Auto Accident-Personal Injury C11 Farm Accident C3 Auto Accident-Fatal C12 Industrial Accident C4 Auto Accident-Departmental C13 Residential Accident C5 Auto Accident-Departmental P.I C14 Rescues, All Types C6 Auto Accident-Departmental Fatal C15 Accidental Stabbing/Shooting C7 Hit & Run Accident-Property C18 Train Derailment Or Accident C8 Hit & Run Accident-Personal C19 Subway Derailment Or Accident C9 Hit & Run Accident-Fatal
Traffic: D1 Abandoned Vehicle D8 Traffic Complaint-D.W.I D2 Parking Complaint D9 Vehicle Pursuit D3 Suspicious Vehicle D10 Boating Complaint D4 Stored Vehicle D11 Boating Accident D5 Tampering W/Motor Vehicle D12 Vessels In Distress, Including D6 Traffic Arrest-D.W.I Grounding D7 Traffic Arrest-Other D13 Traffic Complaint-Other
Assist: E1 Assist Motorist E5 Check On Location E2 Attempt To Locate E6 Slim-Jim Detail E3 Assistance Request E7 Civil Matter E4 Check On Subject
Miscellaneous: F1 Burning Complaints F10 Health/Trash Complaint F3 Notify F11 Warrants/Summons Service F4 Customer Dispute F12 Non-Enumerated Complaint F5 Detention Of O.J. F13 Traffic Stops F6 False Report F14 All Animal Bite Case F7 Found Property F16 Duplicate Call F8 Lost/Stolen Property F17 County Code Violation-Other F9 Noise Complaint F18 Added Information
Sexual Related: G1 Indecent Exposure G3 All Other Sex Offenses G2 Rape G4 Rape Attempt
Theft: H1 Altered Money/Counterfeiting H11 Theft-Other H2 Burglary/B & E Attempt H12 Theft-From Motor Vehicle H3 Burglary/Breaking & Entering H13 Theft-Purse Snatching H4 Credit Card Misuse H14 Theft-Shoplifting H5 Bad Checks H15 Unauthorized Use H6 Failure To Return Rental Property H16 Theft-Boat H7 Failure To Pay H17 Theft-From Boat H8 Forgery H18 Recovered Motor Vehicles H9 Theft-Motor Vehicle H19 Recovered Bikes H10 Theft-Bike H20 Recovered Property
Violence: J1 Robbery-Armed J5 Aggravated Assault J2 Robbery-Unarmed J6 Homicide J3 Robbery-Attempted J7 Simple Assault not spousal) J4 Battery
Racial Religious Ethnic (RRE): K1 Assault/Battery K5 Harassment K2 Cemetery Desecration K6 Telephone Misuse K3 Cross/Religious Symbol Burning K7 Non-Criminal Related Incident K4 Destruction Of Property K8 Other Criminal RRE Incidents
Disposition Codes: 1 Report 7 No Report; Incident Unverified 2 Report: Unfounded 8 No Report; Incident Adjusted 3 Report: Handled By Other Agencies 9 No Accident Report; M.V.A. Forms 4 Report: Incident Unverified Issued Occurred On Public Property 5 No Report; Unfounded 0 No Accident Report; M.V.A. Forms 6 No Report; Handled By Other Agencies Issued Other
BALTIMORE COUNTY FIRE CODES & SIGNALS:
1 Nothing Showing 5 Standard Operation (no lights/siren)
2 Smoke Showing 6 Pre Fire Plan
3 Working Fire 10 Civil Disturbance
4 Possible Additional 30 False Alarm
Companies Needed
MARYLAND STATE HIGHWAY ADMINISTRATION: 10-3 Emergency 10-63 Signal On Flash 10-10 Out Of Service 10-64 Accident With Signal 10-11 Officials Present 10-65 Repeat Message 10-27 Reply To Message 10-66 Request Police For Traffic 10-37 Name Of Operator 10-67 Signal Repaired 10-40 Available For Phone 10-68 No Trouble Found 10-58 Requesting Message 10-69 Name Of Complainant 10-59 Negative 10-78 Pothole In Road 10-60 Light Bulb Defective 10-79 Dead Animal In Roadway 10-61 Signal Damaged 10-88 Advise My Home Of ETA 10-62 Light Cycle Incorrect 10-89 --- Is Calling You
*SHA unit numbers are 4 digits, the first digit corresponding to the district. *
DEPARTMENT OF TRANSPORTATION SIGNALS: Signal 1 Call Office By Phone Signal 9 Auto Accident Signal 2 Call Office Immediately Signal 10 Accident With Injuries Signal 3 Report To Office Signal 14 Radar Set-Up
HOWARD COUNTY POLICE DEPARTMENT: 10-0 Caution 10-50 Accident (F,PI,PD) 10-1 Unable Copy-Change Location 10-51 Tow Truck Needed 10-2 Signal Good 10-52 Ambulance Needed 10-3 Stop Transmitting 10-53 Road Blocked At ____ 10-4 Acknowledgment (ok) 10-54 Livestock On Highway 10-5 Relay 10-55 Intoxicated Driver 10-6 Busy--Unless Urgent 10-56 Intoxicated Pedestrian 10-7 Out Of Service 10-57 Hit & Run (F,PI,PD) 10-8 In Service 10-58 Direct Traffic 10-9 Repeat 10-59 Convoy Or Escort 10-10 Fight In Progress 10-60 Squad In Vicinity 10-11 Dog Case 10-61 Personnel In Area 10-12 Stand By (stop) 10-62 Reply To Message 10-13 Weather--Road Report 10-63 Prepare Make Written Copy 10-14 Prowler Report 10-64 Message For Local Delivery 10-15 Civil Disturbance 10-65 Not Message Assignment 10-16 Domestic Problem 10-66 Message Cancellation 10-17 Meet Complainant 10-67 Clear For Net Message 10-18 Quickly 10-68 Dispatch Information 10-19 Return To _____ 10-69 Message Received 10-20 Location 10-70 Fire Alarm 10-21 Call _____ By Telephone 10-71 Advise Nature Of Fire 10-22 Disregard 10-72 Report Progress Of Fire 10-23 Arrived At Scene 10-73 Smoke Report 10-24 Assignment Completed 10-74 Negative 10-25 Report In Person (meet) 10-75 In Contact With______ 10-26 Detaining Subject, Expedite 10-76 En Route 10-27 Drivers license Information 10-77 ETA (estimated time arrival) 10-28 Vehicle Registration Info. 10-78 Need Assistance 10-29 Check For Wanted 10-79 Notify Coroner 10-30 Unnecessary Use Of Radio 10-80 Chase In Progress 10-31 Crime In Progress 10-81 Breathalyzer Report 10-32 Man With Gun 10-82 Reserve Lodging 10-33 EMERGENCY 10-83 Work School Crossing At ____ 10-34 Riot 10-84 If Meeting __- Advise E 10-35 Major Crime Alert 10-85 Delayed Due To _____ 10-36 Correct Time 10-86 Officer/Operator On Duty 10-37 Investigate Suspicious Car 10-87 Pickup/Distribute Checks 10-38 Stopping Suspicious Car 10-88 Present Telephone # Of 10-39 Urgent---Use Lights/Siren 10-89 Bomb Threat 10-40 Silent Run---No Lights/Siren 10-90 Bank Alarm At _____ 10-41 Beginning Tour Of Duty 10-91 Pick Up Prisoner/Subject 10-42 Ending Tour Of Duty 10-92 Improperly Parked Vehicle 10-43 Information 10-93 Blockade 10-44 Permission To Leave 10-94 Drag Racing 10-45 Animal Carcass At ____ 10-95 Prisoner/Subject In Custody 10-46 Assist Motorist 10-96 Mental Subject 10-47 Emergency Road Repair At__ 10-97 Check (test) Signal 10-48 Traffic Standard Repair 10-98 Prison/Jail Break 10-49 Traffic Light Out At__ 10-99 Wanted/Stolen Indicated
HOWARD COUNTY POLICE DISPATCH CODES: Code 1 Homicide Code 13 Stolen Property Code 2 Rape Code 14 Vandalism Code 3 Robbery Code 15 Weapons Violation Code 4 Assault Code 17 Sex Offenses Code 5 Breaking & Entering Code 18 Narcotics Code 6 Larceny Code 19 Gambling/Vice Code 7 Auto Theft Code 20 Domestic Trouble Code 9 Arson Code 21 Liquor Violations Code 10 Forgery Code 23 Intoxication Code 11 Fraud Code 24 Disorderly Conduct Code 12 Embezzlement Code 29 Runaway/Missing Person
MARYLAND STATE POLICE RADIO CODES & SIGNALS: 10-0 Caution 10-52 Ambulance needed 10-1 Unable to copy - change loc. 10-53 Road blocked at ____ 10-3 Stop transmitting 10-54 Livestock on highway 10-4 Acknowledgement (OK) 10-55 Intoxicated driver 10-5 Relay 10-56 Intoxicated pedestrian 10-6 Busy, unless urgent 10-57 Hit & Run (F, PI, PD) 10-7 Out of service 10-58 Direct traffic 10-8 In service 10-59 Convoy or escort 10-9 Repeat 10-60 Squad in vicinity 10-10 Fight in progress 10-61 Personnel in area 10-11 Dog case 10-62 Reply to message 10-12 Stand-by (stop) 10-63 Prepare to make written copy 10-13 Weather -- road report 10-64 Message for local delivery 10-14 Prowler report 10-65 Net message assignment 10-15 Civil disturbance 10-66 Message cancellation 10-16 Domestic problem 10-67 Clear for net message 10-17 Meet complainant 10-68 Dispatch information 10-18 Quickly 10-69 Message received 10-19 Return to______ 10-70 Fire alarm 10-20 Location 10-71 Advise nature of fire 10-21 Call _____ by telephone 10-72 Report progress on fire 10-22 Disregard 10-73 Smoke report 10-23 Arrived at scene 10-74 Negative 10-24 Assignment completed 10-75 In contact with ______ 10-25 Report in person (meet) 10-76 Enroute 10-26 Detaining subject, expedite 10-77 ETA 10-27 Driver's license information 10-78 Need assistance 10-28 Vehicle registration info. 10-79 Notify coroner 10-29 Check for wanted 10-80 Chase in progress 10-30 Unnecessary use of radio 10-81 Breath test 10-31 Crime in progress 10-82 Reserve lodging 10-32 Man with gun 10-83 Work school crossing at _____ 10-33 EMERGENCY 10-84 If meeting _____ advise ETA 10-34 Riot 10-85 Delayed due to 10-35 Major crime alert 10-86 Officer/operator on duty 10-36 Correct time 10-87 Pick up/distribute checks 10-37 Investigate susp. vehicle 10-88 Present telephone # of ______ 10-38 Stopping suspicious vehicle 10-89 Bomb threat 10-39 Urgent - use light & siren 10-90 Bank alarm at _________ 10-40 Silent run - no light/siren 10-91 Pick up prisoner/subject 10-41 Beginning tour of duty 10-92 Improperly parked vehicle 10-42 Ending tour of duty 10-93 Blockade 10-43 Information 10-94 Drag racing 10-44 Permission to leave ___ for 10-95 Prisoner/subject in custody 10-45 Animal carcass at 10-96 Mental subject 10-46 Assist motorist 10-97 Check (test) signal 10-47 Emergency road repair at ____ 10-98 Prison/jail break 10-48 Traffic standard repair at 10-99 Wanted/stolen indicated 10-49 Traffic light out at ______ 10-50 Accident (F, PI, PD) 10-51 Tow Truck needed
MONTGOMERY COUNTY POLICE:
10-1 Receiving Poorly
10-2 Receiving Well
10-3 No Transmitting Except Emergencies
10-4 Acknowledgement (message received) Two Man Unit
10-5 On The Scene
10-6 Busy
10-7 Out Of Service At (location) Code_____
10-8 In Service
10-9 Repeat Last Message
10-10 Out Of Service, But Available For Call At (location)
10-11 You Are Dispatching Too Rapidly
10-12 Advise Weather & Road Conditions
10-13 Request Tow Truck For Passenger Vehicle At (location)
10-15 Transportation Prisoner In Custody Code______
10-16 Wish Too meal Unit______ Of (location)
10-19 Request Shift Commander At (location)
10-20 What Is Your Location
10-21 Request Field Supervisor At (location)
10-22 Cancel Or Disregard Last Message
10-23 Check For Valid License
10-24 Contact Your Desk Clerk, Your Convenience
10-25 Do You Have Contact With______
10-26 Report To Your Station
10-27 Advise A Phone Number Of______
10-28 Registration Check (listing)
10-29 Check For Wanted/Stolen
10-30 Does Not Confirm To Regulations
10-31 Do You Have Any Calls For Me?
10-32 I Have Nothing For You
10-50 Officer In Trouble, Needs Immediate Help
10-51 Request Assistance At (location) (no emergency)
10-60 Return On Wanted/Stolen Check. Wanted/Stolen In Indicated
10-70 Units Stay Clear Of (location) Surveillance Underway
10-97 How Is My Reception
10-99 Message Acknowledged, One man Unit
10-100 Riot Or Large Disturbance In Progress At (location) Request
Assistance
PRINCE GEORGES COUNTY POLICE DEPARTMENT RADIO CODES & SIGNALS 10-1 Receiving poorly 10-21 Do you have any calls for me? 10-2 Receiving well 10-22 Cancel last message 10-3 Stop transmitting 10-25 Do you have contact with ______ 10-4 Acknowledgement 10-27 Any reply to our message? 10-5 Relay to_______ 10-28 Check registration 10-6 Busy 10-29 Check for wanted or stolen 10-7 Out of service 10-30 Does not conform to regulations 10-8 In service 10-32 Last assignment complete 10-9 Repeat 10-33 Important business at station 10-10 Out of service, available 10-34 Clear for local broadcast 10-11 Transmitting too fast 10-36 Call landline 10-13 Advise weather conditions 10-37 Dispatcher on duty 10-14 Convoy or escort 10-40 Advise landline number 10-14A Army 10-41 No calls for you at this time 10-14B Bank or money 10-42 Check for driver's license 10-14E Explosives 10-62 Unable to copy 10-14F Funeral 10-64 Network free to copy lookout 10-14L Alcohol beverage 10-70 Statewide broadcast 10-14M Marines 10-85 ____left station at _____ 10-14N Navy 10-86 Call home 10-14W Wide load 10-89 _____is calling your station 10-15 Have prisoner in custody 10-94 Test, no voice, transmitter only 10-20 What is your location? 10-97 How do you copy?
SIGNAL CODES:
1 Contact your station landline 44 Bomb threat
2 Contact station, urgent 45 Cave-in
3 Report to your station 46 Motorcycle complaint
3I Report to station, urgent 50 Cross burning
4 Meet complainant for report 60 Assault report
5 Investigate vehicle 61 Burglary report
6 Investigate vehicle occupants 62 House breaking
6I Investigate drunk driver 63 Larceny report
7 Investigate suspicious person 64 Murder
7A Investigate suspicious (caution) 65 Sex
8 Registration information 66 Suicide or attempt
9 Accident 67 Drowning
9I Accident with injuries 68 Disorderly subject
9F Accident with death 70 Drunk
11 Hit & run 71 Family trouble
11I Hit & run with injuries 72 Juvenile report
11F Hit & run with death 73 Disorderly juveniles
12 Jail break at ______ 74 Unlawful assembly of juveniles
13 Officer in trouble, EMERGENCY 75 Request camera
13I Trouble at station, EMERGENCY 76 Assist fire department
14 Investigate felony 76C Assist fire dept. (crowd control)
14F Investigate felony warrants 76T Assist fire dept. (Traffic)
14X Investigate felony will extradite 78 Burglar alarm
15 Unlawful assembly 79 Open building
15F Fight 81 Death report
15R Riot 82 Meet officer at _________
20 Ambulance call, routine 83 Notification at _________
20E Ambulance call, escort 84 Hold up
20I Ambulance call, EMERGENCY 86 Break-in at__________
22 Unknown trouble in building 87 School or church crossing
25 Animal complaint 88 Stop for mail at __________
25B Animal bite 89 Pick up recovered property
25F Animal dead 90 Minor repairs at _________
26 Bad weather, no accident reports 91 Out for gas
30 Summons in lieu of arrest 98 Eating out of area
40 Tack ups (Sheriff only) 99 Out of service for meal
100 Car control transmitter
500 Lock out to follow
MILITARY POLICE RADIO CODES
10-2 - Ambulance urgently needed
10-3 - Motor vehicle accident
10-4 - Wrecker requested
10-5 - Ambulance requested
10-6 - Send civilian police
10-7 - Pick up prisoner
10-8 - Subject in custody
10-9 - Send police van
10-10 - Escort/transport
10-11 - In service
10-12 - Out of service
10-13 - Repeat last message
10-14 - Your location?
10-15 - Go to...
10-16 - Report by landline
10-17 - Return to headquarters
10-18 - Assignment completed
10-19 - Contact/call...
10-20 - Relay to...
10-21 - Time check
10-22 - Fire
10-23 - Disturbance
10-24 - Suspicious person
10-25 - Stolen/abandoned vehicle
10-26 - Serious accident
10-27 - Radio check
10-28 - Loud and clear
10-29 - Signal weak
10-30 - Request assistance (non-emergency)
10-31 - Request investigator
10-32 - Request M.P. duty officer
10-33 - Stand by
10-34 - Cancel last message
10-35 - Meal
10-36 - Any messages?
10-38 - Relief/change
10-39 - Check vehicle/building
10-40 - Acknowledge
10-50 - Change frequency...