09/18/20 21:44:16 UTC
294.7 MHz
TAMPA, FL
MAFIA 55 and MAFIA 99 (T-38C Talons) both in the pattern at McDill. JIMBO 1 just landed. Not sure of aircraft type. Handoff was 239.3, 279.6, 294.7.
 
09/18/20 21:02:42 UTC
239.3 MHz
TAMPA, FL
MAFIA 69 (T-38C Talon) up wiith Tampa App. Just switched over to MacDill Tower for landing on 294.7 MHz.
 
09/18/20 18:36:55 UTC
257.8750 MHz
CAPE MAY, NJ
Devil 11 making the approach into Dover AFB
 
09/18/20 13:21:33 UTC
228.4 MHz
DAYTONA BEACH, FL
Townsend Ga bombing range is active. Weak signals.
 
09/16/20 15:55:47 UTC
281.4000 MHz
CAPE MAY, NJ
WILD 3 checking int ZDC 11 Calvert
 

09/18/20 17:10:09 UTC
31.575 MHz
"...that uh, buzzsaw...(unintelligible) friendly..." helo pilot. Weak/spotty rx. PL 151.4. 09/16/2020 1957h-AJ
 
09/16/20 16:11:37 UTC
259.850 MHz
"in the vicinity of that VORTAC" Jet pilot. Ok rx. 09/15/2020 0942h, prev noted on 07/15/20 -AJ
 
09/14/20 13:29:41 UTC
44.325 MHz
A2A comms of 3x H64's traversing Piedmont NC, E to W. Identified as "Helicopter85561 Flight" on KVUJ CTAF call approx 0850h. Discussing where to land and interestingly what the price of fuel was at various airports, as if they were shopping around. Mentioned KJQF, KHKY and KFQD at various points eventually deciding to get fuel and land at KFQD. 09/14/2020, 0850-0910h -AJ
 
09/13/20 16:41:08 UTC
34.800 MHz
Mentioned in A2A comms on 293.0 "Hey 2, this is lead, I'm getting a decent amount of feedback on Forty-Seventy (40.70 FM), so I'm gonna go up to Thirty-Four-Eighty (34.80 FM)" as inter-ship etc. Discussion of making it to KHFF before needing to "goggle up". 09/12/2020 1937h. ID'd as GUARD26278 flight of 3x H60's (KRUQ based) immed prior to KVUJ tower -AJ
 
09/13/20 16:39:59 UTC
293.000 MHz
A2A "Hey 2, this is lead, I'm getting a decent amount of feedback on Forty-Seventy (40.70 FM), so I'm gonna go up to Thirty-Four-Eighty (34.80 FM)" as inter-ship etc. Discussion of making it to KHFF before needing to "goggle up". 09/12/2020 1937h. ID'd as GUARD26278 flight of 3x H60's (KRUQ based) immed prior to KVUJ tower -AJ
 
09/12/20 16:00:45 UTC
122.725 MHz
CTAF/UNICOM for KRUQ, Mid-Carolina Regional Airport (formerly Rowan County Airport), Salisbury, North Carolina, USA. Changed 3-4 years ago. -AJ
 
09/12/20 15:57:03 UTC
122.725 MHz
KNCA NEW RIVER MCAS /H/ /MCCUTCHEON FLD/ NOTAM: M0129/20 - AERODROME EFFECTIVE 11 SEPT AT 1900L CLOSED FIELD COMMUNICATIONS WILL USE UNICOM FREQ 122.725. PILOT CONTROLLED LIGHTING WILL USE FREQ 120.0. 11 SEP 23:00 2020 UNTIL 08 DEC 23:00 2020. CREATED: 10 SEP 14:32 2020 -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.