DISASTER PREPAREDNESS:
RADIO COMMUNICATIONS
LAST UPDATED: Dec 24, 2023
This page was written by Dave Rogers.
Phones are down. Internet is down. Now what do you do?
In disaster and emergency situations, having and using proper radio equipment can make the difference between life and death. It can be used for gathering important information from standard radio stations, direct from government agencies, including listening in on their activities, and also listening in on other non-traditional sources. It can be used for direct two-way communications with friends, family, and area emergency services (like ambulance, hospitals, fire, and police).
THIS PAGE FOCUSES ON an overview of radio communications and its most important fundamentals.
Prepper's choices for radios span from the basic and cheap store-bought FRS Walkie Talkies, then it's Big Brother GMRS, and then the most popular (and ultimate) in Prepper's Communications: HAM 'Amateur Radio'.
Adorable 6 Year Old HAM Radio Operator Embarrasses Us All!
If a 6 year old can study for and pass her test for the FCC Ham Radio Technician's License (entry level) then so can anyone.
Veronica Harrington on 'Dave Letterman' - March 26, 1992
Dave's Radio Notes
In the Summer of 2021 I purchased the widely popular and heralded "Baofeng UV-5R" Handheld HAM Radio, which does allow me to listen to a lot of local radio traffic. I have yet to get my FCC HAM 'Amateur Radio' license so I can legally transmit from it (yet it's allowed in emergencies).
I decided to FIRST go with GMRS Radios and an FCC GMRS License which does not require a test. The 10 Year License fee is $35 and is good for the entire family. [ Videos on GMRS ]
MY MAY 2023 PREPPING PURCHASES focused on the following Radio Items:
GMRS FCC Radio License ($35 for 10 yrs)
Baofeng GMRS-9R Waterproof Handheld Radio ($60 for kit on Amazon)
Video Review: https://youtu.be/BbpIdy_Vs1YUniversal USB Battery Charger ($9 on eBay) !! very important !!
Video Review: https://youtu.be/iHI-xOjAFaM
Instead of paying for the extra cost of batteries that also have a USB power plug-in to charge them, it makes sense to use this handy universal charger.Software Defined Radio (SDR): Nooelec HF/VHF/UHF ($44 on Amazon)
This USB Device (dongle) allows me to scan and listen to most frequencies on my PC or SmartPhone including CB, GMRS, HAM, Police, Fire, NOAA Weather, Maritime, Aircraft/Airports, Emergency Services, and much more.
VIDEOS - What is an SDR?: https://www.youtube.com/playlist?list=PLMzLJBWCc0hif5Zy5Ts43gKmmy9jNYI0f
VIDEOS - on the Nooelec USB RTL-SDR: https://www.youtube.com/watch?v=yEgxBc0F9TY&list=PLMzLJBWCc0hi2vgjzIbI4Rwxcnl9PDVQs
Links for Radio Beginners
Dave's List of Recommended Radio Products on Amazon
* I don't make a commission.Common Frequencies (U.S.)
NOAA Weather Frequencies
Find the frequency of your local NOAA Weather station. Listen to Local Hourly, Daily, 10 Day Weather Forecasts. Includes emergency and disaster notifications and alerts.Local Frequencies Database
Find and Listen to Local Frequencies Used by local government, emergency, police, and fire.CHIRP Software (free)
Used for programming/configuring and customizing your radio via a USB Programming Cable.How to Setup/Program your Radio
List of Videos. Specifically for Baofeng UV-5R, but are similar to most radios.Web SDR Global Database
Using Your Internet Web Browser, Listen to Live Transmissions (UHF & VHF HAM chatter) from Computer SDR Servers Around the Globe.MyGMRS.com
Database of GMRS Repeaters. Also list of equipment, references, and aids.
Overview on Radios
[ VIDEOS ON Featured Product Reviews ]
- BASIC EMERGENCY RADIOS -
Portable, Battery-Powered Radio (for Listening)
AM / FM / NOAA / SW GET EMERGENCY INFORMATION
A Battery-Powered Radio will be your main source of critical news you will need during a disaster to stay safe and survive. THE FIRST and most important piece of prepping equipment THAT EVERYONE SHOULD HAVE is a Portable, Battery-Powered Radio. Whether this radio is just a plain old AM/FM or just FM radio, or one that also receives NOAA Weather Stations (government issued local info and alerts about weather and disasters), and/or one that also receives Shortwave (SW) radio stations giving you news from around the world -- having something, even if it's basic is vital.
Advanced 'Emergency Radios' often cover FM, NOAA, and SW (Shortwave). Besides regular batteries, many can generate their own power and can recharge its own internal battery via a small solar panel and/or hand-crank. Most have emergency lights and some also high capacity batteries that can charge USB devices like a cell phone. Some are waterproof. Dave lists his recommendations here.
Ham 'Amateur' Radios and GMRS Radios can also receive NOAA & FM stations.
More expensive FRS Handheld Radios can also can receive NOAA stations, and sometimes have an FM option too.
- TWO-WAY RADIO COMMUNICATIONS & ADVANCED MONITORING -
During a disaster, when phone and cell phone systems are down, contacting friends, family, and emergency services are only possible with two-way radio communications outline below. Police, Fire, Government, Military, Security Services, Emergency Services, Hospitals -- all use a form of HAM or GMRS radio services. Some frequencies are encrypted, but some are not - and they are meant to be open and used for them to broadcast emergency information to the public AND for the public to communicate with emergency services during a disaster.
FRS (Family Radio Service) 2 Watts Max | 22 Channels | .3 to 1 mile range | Simple Handheld Walkie Talkies
SHORT RANGE NEIGHBORHOOD no license requiredGMRS (General Mobile Radio Service) 50 Watts Max | 22 FRS Channels + 8 Repeater Channels
[ VIDEOS ON GMRS | Baofeng GMRS-9R Radio ]
BIG BROTHER to FRS / CITY-AREA RANGE FCC 10 year License required for simple $35 fee - no testing
RANGE: Handhelds average 1-2 mile range | Mobile (Car) Units average 5 mile range | Home Base Stations with roof-mounted antenna transmit and receive much further. * NOTE: These are very conservative numbers. GMRS has been know to go 30 miles, but this totally depends on the factors like: radio power; antenna type, size, and its height; and finally your outdoor environment (geography, landscape, weather).
GMRS works on same frequencies/channels as FRS (i.e. they can talk with each other), but GMRS has more power, features, and options. GMRS also has 8 more channels than FRS, for use specifically with repeater towers. Using a repeater tower by any GMRS radio easily extends the range by 20 miles beyond that tower. The $35 FCC License is for 10 Years and covers everyone in your entire family.HAM (Amateur Radio) | The Ultimate in Radio Communications | 1,500 Watts Max
[ VIDEOS ON HAM Radio | Baofeng UV-5R Radio ]
LOCAL/CITY/REGIONAL/GLOBAL FCC 10 year License Required - $35 fee - study and pass testSDR (Software Defined Radio) Windows | Mac | Linux | Android | iPhone | iPad
[ VIDEOS ON SDR | NESDR Smart v5 USB Dongle ]
THE INTEGRATION OF RADIO & COMPUTERS
Listen to and Scan Most Frequencies including AM, FM, Shortwave, NOAA Weather, FRS, GMRS, HAM, and CB including Police, Fire, Maritime, Aircraft/Airports, Emergency Services, and much more.. Some SDRs also can transmit. [ LIST OF SDR Software (most are free) ]
5x5 Radio Education
Radio Bands
SW = SHORTWAVE RADIO (Includes MF & HF)
Listen to SW Radio Stations from across the Globe.
SW Directories: ShortwaveDB | Wikipedia
MF = MEDIUM 300kHz-3MHz | AM Radio
1000-100m (3281-328ft) Wavelengths via: Ground Waves (following curvature of earth), Skywaves (skip bouncing).
HF = HIGH 3-30MHz | CB Radio, HAM, Marine
10-100m (33-328ft) Wavelengths via: Ground Waves (following curvature of earth), Skywaves (skip bouncing).
VHF = VERY HIGH 30-300MHz | FM Radio, TV, HAM, Radar, Aircraft, Maritime, NOAA Weather Radio.
10-1m (33-3.3ft) Wavelengths via: LOS (line of sight).
UHF = ULTRA HIGH 300MHz-3,000MHz | TV, FRS, GMRS, HAM, Mobile Phones, Police, Fire, Satellite, GPS, Wi-Fi, Bluetooth.
100-10cm (3.3ft-4in) Wavelengths via: LOS (line of sight).
WAVELENGTH: The size of the wavelength determines the size and design of the antenna for listening, but especially for transmitting. The lower the frequency (MF & HF) the larger the wavelength and the antenna. The higher the frequency (VHF & UHF) the smaller the wavelength and smaller the antenna.
Voice Radio Frequencies
Frequencies with common voice traffic you can 'scan' or listen to.
AM RADIO 535-1600kHz
CB RADIO 27MHz | 11m | 40ch
BROADCAST TV 54-72MHz, 76-87MHz, 174-216MHz, 512-608MHz, 614-698MHz
FM RADIO 88-108MHz
FRS 462-467MHz | 22 channels (ch1-7:2watts|ch8-14:1/2watts|ch15-22:2watts) Channel 20 used for emergencies.
GMRS 22 FRS channels + 8 repeater channels (ch1-7:5watts|ch8-14:1/2watts|ch15-22:50watts|ch23-30:50watts) Channel 20 used for emergencies.
HAM ‘Amateur Radio’
LF | 135kHz | 135.7-137.8 | 2,200M
MF | 472kHz | 472-479 | 630M
MF | 1.8MHz | 1.8-2.0 | 160M
HF | 3.5MHz | 3.6-4.0 | 80M
HF | 7MHz | 7.125-7.3 | 40M
HF | 14MHz | 14.150-14.350 | 20M
HF | 18MHz | 18.110-18.168 | 17M
HF | 21MHz | 21.200-21.450 | 15M
HF | 24MHz | 24.930-24.990 | 12M
HF | 28MHz | 28.300-29.700 | 10M
HAM ‘Amateur Radio’
VHF | 50MHz | 50.1-54.0 | 6M
VHF | 144MHz | 144.1-148.0 | 2M
VHF | 222MHz | 222.0-225.0 | 1.25M
UHF | 420MHz | 420.0-450.0 | 70cm
UHF | 902MHz | 902.0-928.0 | 33cm
UHF | 1240MHz | 1240-1300 | 23cm
Broadcast Terminology
NATO Phonetic Alphabet
Alpha Bravo Charlie Delta Echo Foxtrot Golf Hotel India Juliet Kilo Lima Mike November Oscar Papa Quebec Romeo Sierra Tango Uniform Victor Whiskey Xray Yankee Zulu
RADIO CHECK
What is my signal strength and readability; how do you hear me?
ROGER | I have received your last transmission satisfactorily.
NOTHING HEARD | Used when no reply is received from a called station.
SLANG
5 by 5 | LOUD & CLEAR | (L)IMA (C)HARLIE
Very Strong Signal Strength AND Excellent Signal Quality.
SIGNAL STRENGTH
LOUD | Your SIGNAL is very strong.
GOOD | WEAK | VERY WEAK
FADING | At times your signal strength fades to such an extent that continuous reception cannot be relied upon.
SIGNAL QUALITY
CLEAR | The quality of your transmission is excellent.
READABLE | Satisfactory.
UNREADABLE | The quality is so bad that I cannot read/understand you.
DISTORTED / WITH INTERFERENCE | Having trouble reading you due to interference.
INTERMITTENT | Having trouble reading you because your signal is intermittent.