About Fort Gratiot charter Police Frequencies
- Trunked radio systems that carry law-enforcement traffic here: Michigan's Public Safety Communications System (MPSCS): 29 talkgroups. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Fort Gratiot charter, start with the Lakeport site of Michigan's Public Safety Communications System (MPSCS), about 6 miles away. Its control channels: 853.575, 853.85, 853.875 MHz.
- 11 listed entries are marked encrypted. No scanner can decode encrypted audio.
St. Clair County channels that also cover Fort Gratiot charter
Michigan's Public Safety Communications System (MPSCS)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| St. Clair County Law Enforcement | Sheriff Special Response Team | 2746 | aba | D |
| St. Clair County Law Enforcement | Law Enforcement | 2129 | 851 | D |
| St. Clair County Law Enforcement Old | Old unused as Police Dispatch | 2268 | 8dc | D |
| St. Clair County Law Enforcement | L.E.I.N. | 2270 | 8de | D |
| St. Clair County Law Enforcement | Clay Twp. Police Secondary | 2716 | a9c | D |
| St. Clair County Law Enforcement | St. Clair Police Proprietary | 2743 | ab7 | D |
| St. Clair County Law Enforcement | Sheriff Administration | 2744 | ab8 | D |
| St. Clair County Law Enforcement | Law Enforcement | 2745 | ab9 | D |
| St. Clair County Law Enforcement | Sheriff Marine Rescue | 2748 | abc | D |
| St. Clair County Law Enforcement | Sheriff Marine Division | 2749 | abd | D |
| St. Clair County Law Enforcement | Memphis Police Proprietary | 2867 | b33 | D |
| St. Clair County Law Enforcement Old | Old unused City Police Dispatch | 12154 | 2f7a | D |
| St. Clair County Law Enforcement | Clay Twp. Police Administration | 12155 | 2f7b | D |
| St. Clair County Law Enforcement | Ira Twp Proprietary | 12170 | 2f8a | D |
| St. Clair County Law Enforcement | Sheriff Corrections Division | 12171 | 2f8b | D |
| St. Clair County Law Enforcement | Court Security | 12190 | 2f9e | D |
| St. Clair County Port Huron Police | Operations | 2736 | ab0 | D |
| St. Clair County Port Huron Police | St. Clair County Port Huron Police – Alternate | 2739 | ab3 | D |
11 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| St. Clair County Law Enforcement | Clay Twp. Police Dispatch | 32763 | 7ffb | D Encrypted |
| St. Clair County Law Enforcement | County 9-1-1 Police Dispatch | 32765 | 7ffd | D Encrypted |
| St. Clair County Port Huron Police | St. Clair County Port Huron Police – Dispatch | 32764 | 7ffc | D Encrypted |
| St. Clair County Law Enforcement | Countywide Narcotics Enforcement Common | 2747 | abb | D Encrypted |
| St. Clair County Law Enforcement | St. Clair Detectives | 11776 | 2e00 | D Encrypted |
| St. Clair County Port Huron Police | Special Operations Team | 2737 | ab1 | D Encrypted |
| St. Clair County Port Huron Police | Detectives | 12935 | 3287 | D Encrypted |
| St. Clair County Port Huron Police | Detectives | 12936 | 3288 | D Encrypted |
| St. Clair County Law Enforcement | Sheriff Detectives | 2699 | a8b | D Encrypted |
| St. Clair County Law Enforcement | Law Enforcement Backup | 32791 | 8017 | D Encrypted |
| St. Clair County Port Huron Police | Detectives | 2738 | ab2 | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Fort Gratiot charter.
Lakeport · Michigan's Public Safety Communications System (MPSCS)
RFSS 2 · Site 3 (hex 3) · NAC 791 · about 6 mi away
Control 853.575, 853.85, 853.875
Voice 851.25, 851.6625, 852.125, 852.375, 852.6875, 852.875, 861.2625
St. Clair County Simulcast · Michigan's Public Safety Communications System (MPSCS)
RFSS 2 · Site 21 (hex 15) · NAC 790 · about 9 mi away
Control 853.45, 853.6375
Voice 769.45625, 851.6875, 851.875, 851.95, 852.45, 852.95, 853.0375, 853.3125, 861.3, 861.725
Sandusky · Michigan's Public Safety Communications System (MPSCS)
RFSS 2 · Site 13 (hex D) · NAC 791 · about 31 mi away
Control 853.4375, 853.9375
Voice 851.9375, 852.4375, 852.9375, 861.5125, 861.5625, 861.9625
What do these numbers mean?
- Control channel
- The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
- Voice
- The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
- Site
- One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
- RFSS (Radio Frequency Sub-System)
- A group of sites run by the same controller. Large Project 25 systems can have several.
- NAC (Network Access Code)
- A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
- Talkgroup
- A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.