Listening to Public Safety Communications

Channel Definitions

Before you can monitor or scan EMS or Fire frequencies, you need to ensure that your radio has been set up with the standard MVRN channel list which includes the following channels.

31CN-EMS460.6125Centre County EMS dispatch
32CN-FIR453.9750Centre County Fire dispatch
33CF-EMS460.4625131.8Clearfield County EMS dispatch
34CF-FIR454.0250146.2Clearfield County Fire dispatch
35CF-G2453.4875156.7Clearfield County Fireground 2 – Rockton
36CF-G3460.6375100.0Clearfield County Fireground 3 – Boggs Township
37CF-G4453.4625146.2Clearfield County Fireground 4 – Sandy Township
38CF-G5453.0750162.2Clearfield County Fireground 5 – Clover Run
39CF-G6453.8625167.9Clearfield County Fireground 6 – Boone Mountain
40CF-G7453.0750151.4Clearfield County Fireground 7 – Karthaus
41CF-G8453.8625141.3Clearfield County Fireground 8 – Chest Township
42CF-G9453.6375136.5Clearfield County Fireground 9 – Cooper Township
43CF-G10453.1500131.8Clearfield County Fireground 10 – Sandy Ridge
44CF-G11460.3375173.8Clearfield County Fireground 11 – Olanta
45CF-G12460.3625127.3Clearfield County Fireground 12 – Rockton

How to Listen

Baofeng G11S, Retevis RB27

To select a channel, press the [+] and [-] buttons until the desired channel number or channel name appears on the display. If you press and hold the [+] or [-] button, it will begin to auto-repeat.

Baofeng GM-15PRO, Radioddity GM-30

To select a channel, enter its channel number using three digits. For example, to select channel 43 you would need to enter “043”.

How to Scan

Baofeng G11S, Retevis RB27

Press and hold the [SCAN/♪] button at the upper left corner of the keypad to initiate scanning of Fire and EMS dispatch frequencies (channels 31-34).

Baofeng GM-15PRO, Radioddity GM-30

Press and hold the [#/z] button at the lower right corner of the keypad to initiate scanning of Fire and EMS dispatch frequencies (channels 31-34).

Centre County Fire and EMS Information

Clearfield County Fire and EMS Information

Understanding Firegrounds

After dispatching one or more fire crews to an incident, the dispatcher will typically assign a local fireground repeater to the incident commander. The fire crew will then use the assigned fireground channel to conduct on-scene communications.

If you are scanning the dispatch frequencies and you hear a dispatcher assign a specific fireground to an incident, you can stop scanning and listen to the fireground frequency. This will allow you to hear all of the action at the scene. If you have two radios, you can continue to scan dispatch frequencies with one while monitoring a fireground with the other.

Firefighting Terminology

1-sideThe front side of a building. Also called the address-side.
2-sideThe left side of a building.
3-sideThe rear of a building.
4-sideThe right side of a building.
accelerantA substance that accelerates or speeds the development and escalation of a fire.
firegroundThe operational area at the scene of a fire; the area in which incident commander is in control.
fully involvedFire, heat and smoke in a structure are so widespread that internal access must wait until fire streams can be applied.
incident commanderThe officer in charge of all activities at an incident.
medevacThe evacuation of persons (usually by air transportation) to a place where they can receive medical care.
oxidizerA hazardous material containing oxygen that can combine with adjacent fuel to start or feed a fire.
structure fireA fire in a residential or commercial building.

EMS Terminology

ALSAdvanced Life Support
altered mental statusA change in a person’s normal level of mentation. A person with altered mental status may range from being comatose to being awake and alert but confused.
anaphylactic shockA collapse of the circulatory system function and decrease in blood pressure from an allergic reaction.
atrial tachycardiaUncontrolled rapid heartbeat in the atria of the heart.
BLSBasic Life Support
cardiac arrestThe sudden temporary or permanent cessation of the heart function.
CPRCardio-Pulmonary Resuscitation
diabetic ketoacidosisA condition resulting from high blood sugar (a.k.a. hyperglycemia) and acid buildup, primarily affecting people with type 1 diabetes.
DKADiabetic Keto-Acidosis
MICUMobile Intensive Care Unit
patient refusalPatient refuses transport to a hospital against medical advice.
pneumothoraxA collapsed lung. This occurs when air leaks into the space between the lung and chest wall. This air pushes on the outside of the lung and makes it collapse.
supra-ventricular tachycardiaA synchronized rapid contraction of the heart ventricles, decreasing cardiac function.
syncopeTemporary loss of consciousness caused by a fall in blood pressure.
TIATransient Ischemic Attack
triagePrioritization of medical response according to the severity of the patient’s condition or injury.
ventricular fibrillationUncontrolled spasm of the heart muscle with no cardiac output.
ventricular tachycardiaUncontrolled rapid heartbeat produced in the ventricular section of the heart.

EMS Response Levels

Response LevelRespondersSeverity
CharlieBLS + ALSnon-emergency
DeltaBLS + ALSemergency
EchoClosest Unitcritical


  • Police dispatch frequencies and Centre County fireground frequencies are not included in the MVRN channel list because they are transmitted in a digital format that cannot be received by most GMRS radios.