Vehicle Patrol, Radio Communication, and Dispatch Procedures

Objective. Students will complete a vehicle pre-trip safety inspection, perform a simulated mobile patrol route with proper scanning technique, and communicate with a simulated dispatcher using correct radio protocol and phonetic alphabet.

Vehicle patrol is one of the most visible and effective tools in security and law enforcement work. A patrol officer who is well-prepared, observant, and communicates clearly multiplies their deterrent effect across a wide area. This lesson covers three linked skills: the pre-trip vehicle inspection, proper patrol scanning technique, and radio communication with a dispatcher.

Pre-Trip Vehicle Inspection

Before any patrol shift begins, you are responsible for the condition of your assigned vehicle. A vehicle failure in the field is a safety hazard to you, the public, and anyone depending on your response. Use the department-issued inspection checklist every time—do not rely on memory.

Work through the checklist in a consistent order to avoid skipping items. A standard security vehicle inspection covers:

Fluid levels: Engine oil, coolant, brake fluid, and windshield washer fluid. Check with the engine off and on a level surface.
Lights: Headlights (high and low beam), taillights, brake lights, turn signals, hazard flashers, and any emergency lighting installed on the vehicle.
Tires: Check all four tires plus the spare for visible damage, sidewall cracking, and adequate tread depth. Look for objects embedded in the tread.
Brakes: Press the brake pedal firmly before moving—it should feel firm, not soft or spongy.
Emergency equipment: Confirm the presence and condition of any flares, reflective triangles, fire extinguisher, and any agency-required gear.
First-aid kit: Verify the kit is present, sealed or stocked to standard, and within any expiration dates on consumable items.
Radio function: Key up and confirm two-way communication with dispatch before leaving the lot. A radio that fails in the field is a critical gap.

Sign and date the checklist. If you find a defect, report it to your supervisor before driving. Never operate a vehicle with a known safety defect. Tag the vehicle out of service using your agency's procedure and document the defect in writing.

Scanning Technique During Mobile Patrol

Effective patrol requires systematic visual scanning, not casual looking. Use a near-to-far pattern: check the immediate area around the vehicle first, then mid-distance, then the horizon. Repeat this cycle continuously.

Slow down at corners, intersections, and blind spots—these are ambush points and areas where pedestrians or hazards appear without warning. At night, use both high and low beams appropriately; high beams illuminate more road but can blind oncoming drivers.

When you observe something worth reporting—a suspicious vehicle, a road hazard, a person in distress—note the exact location (address, intersection, or landmark), the time, and a clear description before you transmit. Transmitting incomplete information wastes dispatch time and delays response.

Radio Communication Fundamentals

Professional radio communication is brief, clear, and structured. Whether your agency uses ten-codes or plain language (many POST-trained agencies now prefer plain language to reduce miscommunication), every transmission follows the same format:

1. Call the unit you are contacting — say dispatch's identifier first.

2. Identify yourself — state your unit number or call sign.

3. Deliver the message — keep it concise.

4. Confirm receipt — wait for acknowledgment.

Example plain-language transmission: "Dispatch, Unit 7. I am 10-8 and beginning patrol of the north lot. Over."

Phonetic Alphabet: When spelling names, license plate characters, or any string that could be misheard, use the NATO phonetic alphabet. Common letters students confuse: B = Bravo, D = Delta, E = Echo, M = Mike, N = November, P = Papa, S = Sierra, T = Tango, V = Victor.

Discipline on the air: Do not transmit unless dispatch clears the channel. Never use profanity, slang, or personal conversation on the radio. Keep emotions out of your voice—calm, steady speech is heard more clearly and sounds professional.

Plate and information checks: When calling in a suspicious vehicle plate, transmit the plate state, then the plate characters spelled phonetically, then the vehicle description and location. Wait for dispatch to confirm receipt before continuing patrol.

Reporting a Road Hazard

When you observe a road hazard (debris, downed wire, damaged sign, flooding), report it immediately. Include: exact location, nature of the hazard, and whether the road is passable. Do not place yourself in danger to mark a hazard—radio dispatch and request appropriate resources (public works, fire, utility company).

End-of-Shift Status Report

At the end of your shift, transmit a brief status report to dispatch: your unit number, that you are going off duty, any open observations or incidents that need follow-up, and your mileage if required by agency policy. This handoff ensures continuity and documents your activity.

Safety Points

Always wear your seatbelt while the vehicle is in motion, even on private property.
Never text or use a handheld device while driving—use the radio mic properly.
If you must stop to write notes, pull completely off the travel lane.
Approach suspicious vehicles from behind and to the driver's side only after following agency protocol and advising dispatch of your location.
In any situation that escalates beyond your authority or training, request law enforcement backup immediately and hold your position safely.

Key terms9

Pre-trip inspectionA systematic check of a vehicle's mechanical condition, safety equipment, and communications gear completed before each patrol shift and documented on a signed checklist.

Scanning techniqueA structured visual search pattern used during patrol—near to far, side to side—to detect hazards, suspicious activity, or persons in distress without overlooking any area.

NATO phonetic alphabetA standardized set of words (Alpha, Bravo, Charlie, etc.) used to spell letters clearly over radio to prevent misidentification of similar-sounding characters.

Unit identificationThe call sign or number assigned to a patrol officer or vehicle that is stated at the start of every radio transmission so dispatch knows who is speaking.

Plain languageA radio communication style that uses clear, everyday words instead of numeric codes, increasingly preferred by POST-trained agencies to reduce miscommunication.

Ten-codesA numeric shorthand system (e.g., 10-4 for acknowledged, 10-8 for in service) historically used on law enforcement radio channels; still in use in many agencies alongside or instead of plain language.

DispatchThe communications center that coordinates radio traffic, assigns calls, relays information between units, and monitors officer safety during patrol.

End-of-shift status reportA brief radio transmission at the conclusion of a patrol shift informing dispatch that the officer is going off duty and noting any unresolved incidents requiring follow-up.

Safety defectAny mechanical or equipment condition on a patrol vehicle that poses a risk of injury or failure; vehicles with known safety defects must be removed from service and documented before anyone drives them.

In class: Pre-trip vehicle inspection practice: using a standard security vehicle inspection checklist (fluid levels, lights, tires, emergency equipment, first-aid kit, radio function), each student completes a full inspection of the training vehicle and signs off the checklist before driving; instructor observes and corrects technique. · Radio communication drill: instructor plays dispatcher; students take turns transmitting and receiving messages using ten-codes or plain language per POST guidelines, phonetic alphabet for spelling names and plates, and proper unit identification, with errors repeated until correct. · Simulated mobile patrol route: students drive (or, if vehicle access is limited, walk a mapped vehicle route) and narrate observations by radio to the dispatcher, call in a suspicious vehicle plate for a simulated check, report a road hazard, and complete an end-of-shift status report—all logged by the instructor.
Materials: Training vehicle or designated route map, vehicle pre-trip inspection checklist, handheld radios or radio simulator, phonetic alphabet reference card, POST radio communications reference, route map
Check: Combined score on pre-trip checklist completion (must have zero missed safety-critical items) and radio communication rubric (clarity, correct protocol, phonetic accuracy); pass mark is 80% overall with no safety-critical checklist item missed.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.