Real-Time Updates:
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| 01/28/20 04:25:11 UTC 318.050 MHz LITCHFIELD, IL **Delayed Post** 20:13 CST 509BW Interplane Frequency "Death23 to Mad Dog" (Mad Dog Whiteman AFB Command Post) |
| 01/27/20 17:53:33 UTC 348.900 MHz LITCHFIELD, IL AR-111 Track Southern Missouri - OILER01 (KC135 Reg 58-0034) practice refueling ops with GORDO14 (E4-B Nighwatch Reg 73-1677) |
| 01/27/20 17:08:07 UTC 307.375 MHz HOPE, AR HOG MOA TAC-Various Comms |
| 01/27/20 17:06:18 UTC 225.500 MHz HOPE, AR Cleared to land at 17:30 |
| 01/27/20 16:51:09 UTC 234.700 MHz HOPE, AR CORRECTION BELOW-NOT 224.700. |
Frequency Updates:
Latest Frequency Submissions
| 01/16/20 15:58:46 UTC 395.225 MHz Alt use-KHFF NOTAM-M0020/20 - PTD FREQ 395.225. 16 JAN 15:30 2020 UNTIL 11 APR 03:59 2020. CREATED: 16 JAN 15:30 2020 -AJ |
| 01/13/20 03:16:07 UTC 11.175 MHz global mil hf |
| 01/11/20 18:08:16 UTC 4.724 MHz EAM -sunflower |
| 01/11/20 06:14:57 UTC 350.350 MHz A to Air range ops from ANG Terrihaute ,,,,MOA,,,attibury |
| 01/09/20 15:09:27 UTC 343.700 MHz !RDU 01/062 SDZ COM REMOTE TRANS/REC 127.8, 343.7 U/S 2001131300-2001172200 -AJ |
| 12/18/19 15:57:15 UTC 140.450 MHz A2A "winds are 230 @ 11 knots 10 statute miles on the vis, calling overcast at 1100, 18 on the temp, 3001 for altemeter" "lead copies, we'll plan on ILS 23"12/10/19 0943h Later noted in use during drop operations in vic of Ft Bragg. Often simultaneously in use with 148.325 -AJ |
| 12/18/19 15:47:23 UTC 228.100 MHz A2A, 1 male & 1 female jet pilot "need little better co-ordination for the 'Pet The Jet'..." also mention of a ceremony and transient training. 12/12/19 ok rx -AJ |
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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 used to 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 Designation | Frequency (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.