04/21/21 19:30:05 UTC
130.300 MHz
ALBEMARLE, NC
Ongoing encrypted signal, not P25.. Presumably from CN-235 96-6046 (ae0437) seen on adsbexchange currently orbiting Asheboro NC (KHBI) area at 16,000ft. 1515h 4/21/2021. -AJ
 
04/20/21 14:57:01 UTC
235.100 MHz
CLINTWOOD, VA
Mid air re-fueling training
 
04/20/21 01:27:39 UTC
240.350 MHz
CLINTWOOD, VA
Mid air re-fueling training Decee 11
 
04/17/21 18:10:17 UTC
69.450 MHz
GRAVEL SWITCH, KY
4 Helos A/A possible UH-60's came from south west and landed Lexington Very long conversation - Talked about Bluegrass Terrain and getting food at Lexington and flying low.
 
04/16/21 16:13:24 UTC
343.250 MHz
CLINTWOOD, VA
Mid air re-fueling training
 

04/13/21 23:15:06 UTC
130.300 MHz
Encrypted signal, identical in audible characteristics to tx's heard on 75.65FM during same timeframe. Not P25.. Presumably from AE66CD currently orbiting Stanly/Montgomery/Anson counties approx 1100-1300h, area on adsbexchange. 4/13/21 -AJ
 
04/13/21 19:11:36 UTC
341.675 MHz
KFBG SIMMONS AAF NOTAM: M0248/21 - AERODROME - FLIGHT STRIP 2 (PU895947) HHC, 2-82ND AHB WILL BE CONDUCTING A COMPANY FTX WITH 1 H60 AIRCRAFT AS PART OF THE OPERAION CONDUCTING PERSONNEL RECOVERY TRAINING. OPERATIONAL FREQUENCIES ARE 341.675 (UHF) , 141.050 (VHF) AND 69.875 (FM).. THE FLIGHT STRIP IS OPEN TO ALL OTHER ROTARY WING AIRCRAFT. 13 APR 15:13 2021 UNTIL 17 APR 02:00 2021. CREATED: 13 APR 15:14 2021 -AJ
 
04/13/21 19:10:59 UTC
141.050 MHz
KFBG SIMMONS AAF NOTAM: M0248/21 - AERODROME - FLIGHT STRIP 2 (PU895947) HHC, 2-82ND AHB WILL BE CONDUCTING A COMPANY FTX WITH 1 H60 AIRCRAFT AS PART OF THE OPERAION CONDUCTING PERSONNEL RECOVERY TRAINING. OPERATIONAL FREQUENCIES ARE 341.675 (UHF) , 141.050 (VHF) AND 69.875 (FM).. THE FLIGHT STRIP IS OPEN TO ALL OTHER ROTARY WING AIRCRAFT. 13 APR 15:13 2021 UNTIL 17 APR 02:00 2021. CREATED: 13 APR 15:14 2021 -AJ
 
04/13/21 19:09:51 UTC
69.875 MHz
KFBG SIMMONS AAF NOTAM: M0248/21 - AERODROME - FLIGHT STRIP 2 (PU895947) HHC, 2-82ND AHB WILL BE CONDUCTING A COMPANY FTX WITH 1 H60 AIRCRAFT AS PART OF THE OPERAION CONDUCTING PERSONNEL RECOVERY TRAINING. OPERATIONAL FREQUENCIES ARE 341.675 (UHF) , 141.050 (VHF) AND 69.875 (FM).. THE FLIGHT STRIP IS OPEN TO ALL OTHER ROTARY WING AIRCRAFT. 13 APR 15:13 2021 UNTIL 17 APR 02:00 2021. CREATED: 13 APR 15:14 2021 -AJ
 
04/08/21 15:29:57 UTC
130.300 MHz
FLIP33 to OMEGA DZ/CCT, doing night-time bundle drops at KVUJ. 2100h+ 04/07/2021. -AJ
 
04/08/21 15:28:28 UTC
130.300 MHz
FLIP33 doing night-time bundle drops at KVUJ. 2100h+ 04/07/2021. -
 
04/06/21 16:36:55 UTC
38.650 MHz
A2A, helos "...in the forest that I saw, they definately weren't regular campsites..." 1140h, 04/06/2021 -AJ
 


HAVEQUICK Military Radio System:
What it Is and What It's Not

HQ, HAVE QUICK are other names the HAVEQUICK Frequency Hopping system is referred to as.


In this article I hope to give you a better understanding on what the Military HAVEQUICK radio system is, how it works, and what it's not.

It is important to remember that HAVEQUICK is NOT a form nor was intended to be a form of encryption. Many HAVEQUICK transmissions are voice analog and in the clear. Yes, encryption can be used. However the HAVEQUICK radio system was not developed with the intent of being an encryption system. I have personally heard some HAVEQUICK encrypted comms on the scanner however most of the HAVEQUICK transmission were in the clear and you could usually make out a word or two during the transmission.

HAVEQUICK is a frequency hopping system is used as an anti-jamming communication system. Basically the HAVEQUICK system uses a series of 16 UHF AM (225-380 MHz) radio frequencies. During a radio transmission a computer in the aircraft rapidly switches the transmission between the 16 pre-set frequencies, both the length and order of frequency selection are "random" and are based on very precise timing. The the transmitter and receiver must be "in-sync" as to the timing of each frequency switch or the received signal will be broken.

The perfered method of frequency switch timing is via a GPS receiver attached to the HAVEQUICK radio. However GPS is not always a perfect method. GPS signals can be blocked during various maneuvers a jet figher is performing during a dog-fight. GPS signal can also be blocked by another aircraft above, blocking line-of-site to the GPS satelittes. Due to these possiblities HAVEQUICK radios have other methods of getting a "timing-tick" signal.

In the absence of GPS equipment, a Time Signal Set (TSS) can pass Time-Of-Day (TOD) over-the-air to any HAVEQUICK radio. These TSS's are normally installed at Air Force bases or on large surface vessels.

Another method of sending TOD information to a HAVEQUICK radio is from an AWACS or JSTARS aircraft. These aircraft have onboard rubidium oscillators that can pass an accurate TOD signal to any HAVEQUICK radio. I have personally heard these TOD signals, below is a YouTube video I made of such a signal.

Video of Actual TOD Timing Signal from an AWACS during Exercises in Florida


When you are searching the Military Air Band (225-380 MHz) and your scanner stops on what seems like a transmission that was the length of a word or two, that was probably a HAVEQUICK transmission. The table below outlines the HAVEQUICK frequenices. These frequencies are what are known as the "Frequency Managed Training Net".

FMT-Net for Continental United States
Channel DesignationFrequency (AM)
Preset Channel 20:235.050 MHz
Preset Channel 19:225.150 MHz
Preset Channel 18:252.925 MHz
Preset Channel 17:239.950 MHz
Preset Channel 16:271.950 MHz
Preset Channel 15:267.850 MHz
Preset Channel 14:262.450 MHz
Preset Channel 13:257.250 MHz
Preset Channel 12:314.450 MHz
Preset Channel 11:308.750 MHz
Preset Channel 10:303.275 MHz
Preset Channel 9:298.650 MHz
Preset Channel 8:293.550 MHz
Preset Channel 7:289.050 MHz
Preset Channel 6:284.150 MHz
Preset Channel 5:279.750 MHz
TOD AWACS/JSTARS signal 287.450 MHz



I have personally heard HAVEQUICK comms on all of the above frequencies except for 298.650. That could simply be that over the years my searching scanner just never was at the right place at the right time.

The above frequencies maintain a 4 MHz minimum separation and have been standardized for continental United States FMT-Nets. These frequencies are in the order in which they will be used for training by the Tactical Air Command.

You may ask why Preset Channels 0 - 4 do not exist in the above table. I do not know the answer to that question, but I do have some thoughts. There are 2 different types of nets, FMT-Nets as outlined here and are used for training in the CONUS. Then there are T-Nets. I believe the empty channels deal with allowing open memory in the HAVEQUICK radios to allow for the coded "Word-of-the-Day" which are used in T-Nets. Just a thought.

I had always know a little about what HAVEQUICK was and how it functioned. However until doing some research I didn't know the HAVEQUICK frequency order until I found an online non-classified document. Now with this information I am going to try and scan HAVEQUICK and hear the entire transmission. My first thought is to enter the above frequencies into a bank, in the order as listed above without any delay. Next time there are HAVEQUICK transmissions in Florida I hope to learn more.

I hope you've enjoyed this article.