X0   Community police officer
X    Regular district patrol  officer
X3   Second regular district patrol officer
2XX  Bay City  Detectives/Officers
GX   Gang Task Force
2x   Essexville public safety-(PD  / Fire)
3x   Auburn
Ixxx State Police Investigators
30xx State police  C.I.D.
31xx State Police - Post 31 Bay City
39xx U.S. Marshall’s - Bay  City
4xx  Sheriffs department car
41xx Sheriff Deputies patrol  area
480  Emergency Services Coordinator
496, 497 & 498 - Sheriff  marine patrol
7x   Hampton Township
8x   Pinconning
9x   Delta  College
14x  Northern Bay Ambulance-Pinconning
15x  Bay Regional Medical  Center Ambulance
 
0 - Deceased
1 - Homicide
2 - Rape
3 - Enroute to  intake
4 - Clear with no report
7 - Unable to locate
(10)7-Out of  Service
(10)8-In service
9 - Disregard and Clear
(10)9-Misdemeanor  warrant
(10)10-Felony warrant
11 - Prostitution
12 -  Drugs
(10)19-Enroute to the station
48 - Uncooperative / Mentally  unstable, etc.
49 - Suicide
70 - D.O.A.
90 - Bomb Threat?
339 -  Intoxicated persons under a hold due to blood alcohol level
2000 -  Arson
Center 40 or 40-Sheriffs Department HQ.
 (Law Enforcement  Center)
Station1 - Bay City Police HQ.
 (Law Enforcement  Center)
Signal 1 - Situation under control
Signal 2 - I need another unit,  but no rush
Signal 3 - State Police return to post
Signal 4 – Need Help  NOW
Signal D - Personal Break for State Police
Code XXXX- Bank Robbery /  Holdup
 (XXXX = some numbers)
Acronyms
A.I.             Accident  Investigator
A.L.S.          Advanced Life Support (ALPHA)
A.C.F.A.        Attempt to Commit Felonious Assault
A.D.W.         Assault with a Deadly  Weapon
A.R.M.         Alternate Report Method  (No written  report)
A.R.T.C.C.    Air Route Traffic Control Center
A.T.I.S.         Automatic Terminal Information Service (Airports)
A.T.L.          Attempt To  Locate
A.W.O.S
. Automated Weather Observation  System
B.C.J.          Bay County Jail
B.L.S.          Basic Life  Support (BRAVO)
B.M.C.         Bay Regional Medical Center
B.O.L.          Be On the Lookout
C.C.W.        Carrying Concealed  Weapon
C.H.F.         Congestive Heart Failure
C.L.N.C.      Clearance  (Airports)
C.M.I.S.      Criminal Management Information  System
C.S.C.         Criminal Sexual Conduct
D.W.I.         Driving  While Intoxicated 
D.W.L.S.      Driving While License  Suspended
E.T.O.H.      Alcohol
F.A.C.         Failed to Appear in  Court
F.C.J.         Failure to Comply with Judgment
F.T.A.          Failure To Appear (in court)
F.T.C.         Failure To Comply (with court  judgment)
G.O.A.        Gone On Arrival
H & R         Hit  & Run
H.E.A.R.N    Hospital Emergency Administrative Radio  Network
HEELO        Helicopter
HIWAS       Hazardous In-flight Weather  Advisory Service
HOOK        Tow truck
ILS            Instrument  Landing System
K                Killed
KEYHOLDER Has keys to get into  the place
L.E.I.N.        Law Enforcement Information  Network
L.Z.             Landing Zone (helicopters)
M.E.             Medical Examiner
M.I.P.         Minors In Possession of alcohol or  Tobacco
M.D.O.P.     Malicious Destruction Of Property
M.D.T.         Mobile Data Terminal
M.S.O.        Marine Safety Officer (Coast  Guard)
N.C.I.C.      National Crime Information  Center
O.D.           Officer of the Day (Coast Guard)
O.T.L.          Out To Lunch
O.U.I.L.      Operating Under the Influence of Liquor (or  O.U.)
P & L          Prostitution & Loitering
PAT.COMM. PATrol  COMMander (Coast Guard)
P.B.T.         Portable Breathalyzer  Test
P.D.A.         Property Damage Accident
P.I.            Personal  Injury accident
P.I.W.        Person(s) In Water
P.O.B.        Persons On  Board
P.P.O.        Personal Protection Order
R.A.           Robbery  Armed
R.T.D.        Return To Department –  Lunch/Dinner
RIG           Ambulance
RUNNER      Someone who is  responsible at the place
RVR           Runway Visual  Range
S.A.R.        Search And Rescue
S.O.R.       Sex Offender  Registration
S.O.S.        Secretary Of State
T.X.           Telephone  call
TRACON     Air Traffic Control
U.C.         Under  Cover
U.D.A.A.    Unlawfully Driving Away an Automobile 
U.T.L.        Unable To Locate
V.C.S.A.    Violation of Chemical Substance  Act
V.F.R.       Visual Flight Rules (Airplanes)
 
V.O.R.      VHF Omni-directional  Radio-range (Airplanes)
V.P.H.C.    Violation of Public Health Code