Florida Police Codes and Scanner Signals

Tune into a Florida Highway Patrol feed or a Miami-Dade dispatch channel and you’ll hear something that sounds different from the rest of the country: “Signal 4,” “Signal 7,” “Signal 20.” While most of America built its radio shorthand around ten-codes, Florida went its own way and leaned on a signal system. This guide covers the signals and 10-codes you’ll hear on a Florida scanner, who uses what, and the important caveat that a signal number can mean two different things depending on which agency is talking.

The quick answer: Florida law enforcement primarily uses Signal codes (Signal 1 through Signal 100), alongside a smaller set of standard 10-codes for officer status. The signals describe what’s happening — a crash, a death, a person in crisis — while 10-codes tend to handle routine communication like acknowledging a message or going in and out of service.

How Florida’s Radio System Came to Be Different

Florida started using signals back in the 1950s, when the Highway Patrol was a young agency and wanted something shorter than full sentences but distinct from the ten-codes spreading out of Illinois. While departments elsewhere were adopting the APCO ten-code list wholesale, Florida charted a parallel course. The signal habit stuck, and it spread from FHP to the county sheriff’s offices and many city departments, becoming the dominant dialect of Florida law enforcement radio.

Today the landscape breaks down roughly like this. The Florida Highway Patrol (FHP) uses the original and most detailed signal list, covering everything from accidents to fatalities to vehicle pursuits across the state’s highways. Sheriff’s offices — Miami-Dade, Broward, Hillsborough, Pinellas, Orange, and others — use signal lists very close to FHP’s, with their own local tweaks layered on. City police departments vary more; some, like agencies in Tampa and Jacksonville, blend signals with 10-codes, but most lean on signals as their backbone.

There is no single state law forcing every Florida department onto the same list. Each agency sets its own protocol through its standard operating procedures, which is exactly why the same signal number can carry different meanings across county lines. A signal that’s routine in one jurisdiction can be an emergency in the next, and the only way to know for sure is to anchor it to the agency that broadcast it. If you want to see how the national ten-code tradition developed by contrast, our guide to US police 10-codes traces that history and explains why Florida’s divergence is the exception rather than the rule.

Florida Signal Codes (Common List)

These are widely recognised Florida signals, drawn from the FHP-style system that most agencies build on. Treat them as the common baseline, not a universal standard.

*This is exactly where Florida gets tricky. On the Florida Highway Patrol, “Signal 20” is widely used to mean situation under control — their equivalent of a Code 4. But in several county systems, such as Broward, Signal 20 means a mentally ill subject. Same number, two very different meanings, and the gap between them is enormous: one says “everything’s fine here,” the other describes a person in crisis who may need careful handling. Always anchor a signal to the agency that broadcast it, because guessing wrong on Signal 20 is the single most common mistake new Florida scanner listeners make.

Florida 10-Codes for Officer Status

Alongside the signals, Florida agencies use a slimmer set of standard 10-codes, mostly for communication and status rather than incident type. The division of labour is clean: signals tell you the nature of the call, and 10-codes tell you what the officer is doing about it.

So a Florida transmission often mixes both systems in one breath: a deputy might announce “Signal 4 with injuries” and then clear the call with “10-8.” The signals carry the event, the 10-codes carry the status, and a fluent listener tracks both at once. Some agencies add status codes on top of this — a short code appended when an officer goes back in service to indicate how the call resolved — which makes a Florida transmission a layered thing once you start listening closely.

The Phonetic Alphabet on Florida Channels

Florida officers spell names, streets, and plates with the NATO phonetic alphabet, the same standard used across US law enforcement and aviation.

You’ll hear it constantly on traffic stops, when a trooper reads a tag out as “Foxtrot-Lima-three-two-one” so dispatch doesn’t mishear it. The phonetic alphabet is one of the few pieces of Florida radio that doesn’t vary between agencies, precisely because it’s an international standard rather than a local invention.

Why Florida Signals Vary So Much

The variation across Florida agencies isn’t sloppiness — it’s history. Each department wrote its own signal list decades ago to fit its own needs, and those lists hardened into local tradition. A coastal agency needed marine and drowning signals; an inland county leaned on different ones; a big urban department like Miami-Dade developed fine distinctions a rural county never needed. Because there was never a statewide mandate to unify them, the lists never converged. They drifted, and the drift became permanent.

For a scanner listener, this means two practical things. First, the same number genuinely can mean different things twenty miles apart, with Signal 20 the cleanest example but far from the only one. Second, larger agencies have started shifting routine traffic toward plain language to make cross-agency work smoother, especially during hurricanes and major events when departments from across the state respond together and a shared signal vocabulary can’t be assumed. The signals aren’t going away — fire up a Florida Highway Patrol or Miami-Dade feed any night and you’ll hear them in steady rotation — but plain English now rides alongside them, and the proportion of plain language grows with the size of the agency.

Looking at how an entirely different country structures its police communication can put Florida’s quirks in perspective; our US police code overview and the broader US police code category are good places to compare, and they make clear that Florida’s signal system is genuinely unusual even by American standards.

A Word on Encryption and Listening

One trend worth flagging for anyone planning to follow Florida channels: a growing number of agencies have moved to encrypted digital radio, which can’t be monitored on a conventional scanner. This is happening unevenly — some departments still broadcast in the clear, others have gone fully encrypted, and a few encrypt only sensitive channels like tactical or investigative traffic. Before you invest time learning a particular agency’s signal list, it’s worth checking whether that agency is still listenable at all. Apps and sites such as Broadcastify carry live feeds for the agencies that remain open, and they’re the easiest place to confirm what you can actually hear in your area.

Tips for Listening to a Florida Scanner

• Learn the famous five first. Signal 4 (accident), Signal 7 (deceased), Signal 9 (stolen vehicle), Signal 0 (officer needs help), and Signal 100 (clear the air) come up constantly and anchor most serious calls.
• Know your agency. Before trusting a meaning, confirm whether you’re hearing FHP, a sheriff’s office, or a city PD, because the same number can diverge.
• Watch the Signal 20 trap. It can mean “under control” or “mentally ill subject” depending on who’s speaking — the most important single distinction in Florida radio.
• Expect a blend. Signals plus 10-codes plus the occasional status code plus plain language all share modern Florida channels.
• Check listenability first. Confirm an agency hasn’t encrypted before you spend time learning its list.
• Use a live feed to practise and keep your agency’s signal sheet open beside you until the common ones become second nature.

Using Police Code to Explore Further

Police Code is a global police code explorer designed to take the guesswork out of moments like hearing an unfamiliar signal and not knowing whether it’s good news or bad. Rather than hunting through forums and mismatched PDFs, you can search one organised database that lines up signals, 10-codes, and the legal references behind them across agencies and countries. It’s free to browse and built for scanner hobbyists, reporters, students, and the simply curious. The US 10-codes category and the master police code lists page are the natural next stops, and they let you compare Florida’s signal system directly against the ten-code states that surround it.

The takeaway for Florida is that its radio language really is its own dialect. Master the handful of signals that carry the most weight, keep the Signal 20 ambiguity in mind, always identify the agency before you trust a meaning, and remember that signals, 10-codes, and plain language now share the air. Do that, and the steady stream of “Signal this, 10-that” on a Florida scanner resolves into a clear picture of what’s happening on the streets of the Sunshine State.