Study guide
11.3 Radios, Phonetic Alphabet & 10-Codes
Florida FDACS Class D Security Officer Exam Exam
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1 Chapter 1: Introduction & Exam Overview
1.1 Current Exam Facts 1.2 Eligibility, Application & Fees 1.3 40-Hour Curriculum Map & Study Weights
2 Chapter 2: Chapter 493 & Licensing Law
2.1 Legislative Intent & Key Definitions 2.2 Class D, Class G & Related License Classes 2.3 Prohibited Acts, Discipline & Division Oversight
3 Chapter 3: Use of Force, Detention & Liability
3.1 Florida Statute 776: Force & Stand Your Ground 3.2 Detention, Citizen's Arrest & Shopkeeper's Privilege 3.3 Trespass Law & Civil/Criminal Liability 3.4 Incident Scene, Evidence Preservation & Search Limits
4 Chapter 4: Courtroom Procedures & Role of Security
4.1 Courtroom Procedures & Testimony 4.2 Role of Private Security: Assets, Observe & Report 4.3 Contract vs Proprietary Security & Post Orders
5 Chapter 5: Security Officer Conduct
5.1 Ethics, Appearance, Assertiveness & Readiness 5.2 Public Relations, Client Relations & Customer Service 5.3 Cultural Diversity, EEO & Harassment
6 Chapter 6: Communications & Observation/Reporting
6.1 Interpersonal Communication & De-escalation 6.2 Observation Skills & Physical Descriptions 6.3 Incident Reporting & the Six Interrogatives
7 Chapter 7: Access Control, Patrols & Information Security
7.1 Principles of Access Control 7.2 Patrol Types, Techniques & Equipment 7.3 Safeguarding Information & OPSEC Basics
8 Chapter 8: Physical Security, Interviewing & Emergency Preparedness
8.1 Physical Security: Locks, Alarms, CCTV 8.2 Interviewing Techniques (Not Interrogation) 8.3 Emergency Preparedness: Disasters, Fire, Bomb, Evacuation
9 Chapter 9: Safety Awareness
9.1 Workplace Safety Hazards & Accident Prevention 9.2 HazMat Labels, OSHA Awareness & Officer Safety 9.3 Workplace Violence Recognition & Response
10 Chapter 10: Medical Emergencies
10.1 Good Samaritan Act & Blood-Borne Pathogens 10.2 Basic First Aid for Security Officers 10.3 CPR, AEDs & When to Activate EMS
11 Chapter 11: Terrorism, Events & Communications Systems
11.1 Terrorism Awareness, CBRNE & See Something Say Something 11.2 Event Security, Crowd Control & Traffic Direction 11.3 Radios, Phonetic Alphabet & 10-Codes
12 Chapter 12: Special Issues, Weapons & Exam Strategy
12.1 Active Shooter (Run-Hide-Fight) & Gang Awareness 12.2 Introduction to Weapons & Class G Limits 12.3 Exam Strategy (128/170), Retakes & Career Paths
11.3 Radios, Phonetic Alphabet & 10-Codes
Key Takeaways Explain This Topic AI
Two-way radio etiquette means listen before transmitting, keep messages brief and clear, identify your unit, and never transmit confidential details on an open channel.
Telephone, PA, and intercom systems each have different audience and privacy implications — choose the channel that fits urgency and sensitivity.
The NATO phonetic alphabet (Alpha through Zulu) reduces letter confusion over radio; use standard words rather than improvised 'S as in Sam' substitutes.
10-codes are useful for awareness when a site uses them, but many agencies prefer plain language for multi-agency clarity — follow post orders.
Effective emergency radio traffic states location, nature of emergency, and what help is needed, then clears the channel for essential traffic.
Last updated: July 2026
11.3 Radios, Phonetic Alphabet & 10-Codes
Quick answer: Security communications systems — two-way radios, telephones, PA, and intercoms — only help if the message is heard, understood, and actionable . Class D officers use professional radio etiquette, spell critical details with the NATO phonetic alphabet , understand common 10-codes when a site uses them, and shift to plain language when post orders or multi-agency response require it.
Why communications systems training matters
Observation without communication leaves a supervisor blind. Communication without discipline clogs the channel, broadcasts confidential information, or creates misunderstandings that waste response time. Florida Class D curriculum includes communications systems as its own topic because officers on patrol, at events, and during emergencies depend on shared radio discipline as much as on locks or cameras.
Two-way radio etiquette
Most posts use portable radios on a shared frequency or talkgroup. Professional habits include:
Listen before you talk — wait for a break so you do not "step on" another transmission.
Press, pause, speak — key the mic, wait a beat, then speak; release when finished so others can reply.
Identify yourself — use your assigned call sign or post name ("Gate 2 to Base") rather than unnamed chatter.
Be brief and plain — state location, situation, and what you need; avoid jokes, sarcasm, and long stories on an operational channel.
Speak clearly — moderate pace, across the mic, not shouting; shield from wind when outdoors.
Acknowledge — confirm you received instructions ("Copy" / "10-4" if that is site language) so the sender knows the message landed.
Protect sensitive information — do not broadcast names of juveniles, medical details, alarm codes, Social Security numbers, or exact combinations of a safe over an open or easily monitored channel; switch to phone or face-to-face when required.
Emergency traffic — when life safety is involved, keep the channel clear after the initial call so responders can coordinate.
A useful emergency radio format is: who you are, where you are, what is happening, what you need — for example, "Base, this is Patrol 3 at Dock Door B, smoke in the warehouse, request fire department and evacuate the east wing."
Telephone, PA, and intercom
Not every message belongs on the radio:
- System Best use Cautions
- Two-way radio Fast coordination among officers on post Open to eavesdropping; limited privacy
Telephone / cell Sensitive details, long explanations, outside agencies Confirm you have the right number; keep emergency lines free
Public address (PA) Crowd directions, evacuation announcements, weather warnings Wording must be calm and clear; panic language spreads panic
Intercom / door stations Visitor screening, controlled entry conversations Verify identity before buzzing anyone in; do not prop doors after a remote unlock without visual confirmation when policy requires it
PA announcements during emergencies should give a simple instruction and a destination ("Attention: leave the building using the nearest exit and assemble in Parking Lot C") rather than graphic detail about the hazard. Intercoms are access-control tools: an officer who unlocks a door without verifying the visitor has defeated the system.
NATO phonetic alphabet
Spelling names, tag numbers, and license plates over a noisy radio fails when "B" sounds like "D" or "M" sounds like "N." The internationally standardized NATO phonetic alphabet assigns a distinct word to each letter:
- Letter Word Letter Word
- A Alpha N November
- B Bravo O Oscar
- C Charlie P Papa
- D Delta Q Quebec
- E Echo R Romeo
- F Foxtrot S Sierra
- G Golf T Tango
- H Hotel U Uniform
- I India V Victor
- J Juliett W Whiskey
- K Kilo X X-ray
- L Lima Y Yankee
- M Mike Z Zulu
Example: plate "BKG 472" becomes "Bravo Kilo Golf four seven two." Officers should use the standard words, not homemade substitutes ("B as in boy"), because mixed systems create the confusion the alphabet was designed to prevent. Numbers are spoken clearly; some systems teach "niner" for 9 to avoid confusion with German "nein" or muffled "five," following aviation/military practice when the site requires it.
10-codes: awareness and plain-language preference
10-codes (ten-codes) are shorthand radio signals once common in public safety. Class D officers need awareness of frequently encountered codes because some clients and older post cultures still use them, for example:
- 10-4 — acknowledgment / OK
- 10-7 — out of service
- 10-8 — in service
- 10-9 — repeat
- 10-10 — fight in progress (varies by list)
- 10-20 — location ("What's your 20?")
- 10-33 — emergency / help needed (varies)
- 10-99 — wanted person / emergency (highly variable by agency)
Critical teaching point: 10-code lists are not universal. The same number can mean different things in different jurisdictions, which is dangerous during multi-agency incidents. For that reason, many modern agencies and NIMS/ICS-oriented guidance prefer plain language ("I need backup at the south gate — fight in progress") so fire, EMS, police, and private security all understand the same words. Florida Class D officers should:
Learn the codes their specific post uses, if any.
Default to plain language when speaking with outside agencies, during major emergencies, or whenever post orders say so.
Never invent codes or assume a visitor from another company shares the same list.
Putting systems together on post
A professional Class D communicator chooses the right tool, keeps radio traffic short, spells critical identifiers phonetically, protects confidential data, and switches to plain language when clarity for mixed responders matters more than shorthand. Those habits turn radios and PA systems from background noise into reliable life-safety tools on everyday posts and special events alike.