In several of my old Monitoring Times Milcom columns, I documented the changeover of CAP to a new narrowband VHF frequency system. All the new narrowband repeaters (output frequencies are 148.125 and 148.150 MHz) are dual mode, meaning that they use CTCSS tones in the analog mode or if the mission dictates the P25 digital mode (NAC codes). Inputs frequencies to the repeater outputs have changed also and they no longer use 143.750 and 143.900 MHz. The new inputs in the majority of the country are 143.550 and 143.700 MHz respectively.
CAP repeaters near the United States/Canadian border have alternative repeater input frequencies, to reduce interference with Canadian users of this spectrum. Border areas are using 139.875 and 143.600 MHz respectively.
Based on extensive monitoring the frequency/designator list below is believed to be the current load out of the ground radios used by the Civil Air Patrol nationwide.
National CAP Plan (Zone 1 Analog and Zone 16 Digital)
Frequency PL Tone (Hz) Usage Frequency (MHz) NAC Designator
141.5750 Simplex -- CC-1 127.3 Hz / 4F9 Command Control
141.0000 Simplex -- CC-2 131.8 Hz / 526 Command Control
149.2750 Simplex -- Air-1 141.3 Hz / 585 Air-to-Air
150.5625 Simplex -- Air-2 151.4 Hz / 5EA Air-to-Air
150.2250 Simplex -- Guard-1 162.2 Hz / 656 CAP Guard Channel
139.8750 Simplex -- TAC-1 173.8 Hz / 6CA Tactical/Miscellaneous use
148.1250/143.5500 -- R65 CAT 100.0 Hz / R65P CAT 3E8 Repeater Common Access Tone (CAT)
148.1500/143.7000 -- R66 CAT 100.0 Hz / R66P CAT 3E8 Repeater Common Access Tone (CAT)
148.1375/143.6250 -- R67 203.5 Hz / R67P 7F3 Airborne/Tactical Repeater
148.1375/143.6250 -- R68 192.8 Hz / R68P 788 Airborne/Tactical Repeater
148.1375/143.6250 -- R69 131.8 Hz / R69P 526 Airborne/Tactical Repeater
148.1375/143.6250 -- R70 162.2 Hz / R70P 656 Airborne/Tactical Repeater
148.1250/143.5500 -- R63 203.5 Hz / R63P 7F3 Airborne/Tactical Repeater
148.1500/143.7000 -- R64 203.5 Hz / R64P 7F3 Airborne/Tactical Repeater
In areas near the Canadian border, the following Zone 1/16 repeater band plan is in use:
148.1250/139.8750 -- R101 71.9 Hz / R101P 2CF Canadian Border Zone Repeater
148.1500/143.6000 -- R102 71.9 Hz / R102P 2CF Canadian Border Zone Repeater
148.1250/139.8750 -- R103 77.0 Hz / R103P 302 Canadian Border Zone Repeater
148.1500/143.6000 -- R104 77.0 Hz / R104P 302 Canadian Border Zone Repeater
148.1250/139.8750 -- R105 82.5 Hz / R105P 339 Canadian Border Zone Repeater
148.1500/143.6000 -- R106 82.5 Hz / R106P 339 Canadian Border Zone Repeater
148.1250/139.8750 -- R107 88.5 Hz / R107P 375 Canadian Border Zone Repeater
148.1250/139.8750 -- R108 CAT 100.0 Hz / R108P CAT 3E8 Canadian Border Zone CAT Repeater
148.1500/143.6000 -- R109 CAT 100.0 Hz / R109P CAT 3E8 Canadian Border Zone CAT Tactical Repeater
148.1250/139.8750 -- R110 203.5 Hz / R110P 7F3 Canadian Border Zone Tactical Repeater
148.1500/143.6000 -- R111 203.5 Hz / R111P 7F3 Canadian Border Zone Tactical Repeater
The remainder of the zones in these new CAP radios use the following setup.
Zones 2 and 3 – Suppose to be set aside for local options. Both zones were used for the old pre-narrowband band plan. Some wings have programmed P25 repeaters into these two zones.
Zones 4 and 5 – Interoperability frequencies in use in the area that the radio will be used (e.g., law enforcement, fire/rescue, etc.). Zone 4 appears to be used for wideband interop and Zone 5 is narrowband interop. Some wings use Zone 5 for weather channels (WX1-7).
Zone 6 – Appears to be a reserve zone; was used for the old CAP pre narrowband band plan.
Zone 7 – Most wings selected US Coast Guard marine frequencies (CG-06, 16, 21A, 22A, 23A, 81A, 82A and 83A) and the National Weather Service frequencies (WX-1-7) programmed. Some wings also program VHF Interop into this zone.
Zone 8 – Analog repeater designators 1-16 (For Zones 8-15 see Table 1)
Zone 9 – Analog repeater designators 17-32
Zone 10 – Analog repeater designators 33-48
Zone 11 – Analog repeater designators 49-64
Zone 12 – P25 repeater designators 1-16
Zone 13 – P25 repeater designators 17-32
Zone 14 – P25 repeater designators 33-48
Zone 15 – P25 repeater designators 49-64
Zone 16 – National Plan (see Zone 1 listings above; used for P25 mode communications.)
Table 1: Zone 8 - 15 Repeater Frequency List
Repeater Output/Input (MHz) -- Analog Designator CTCSS PL tone (Hz) /P25 Designator NAC
Zone 8 Analog / Zone 12 Digital
148.1250/143.5500 -- R01 110.9 Hz / R01P 455
148.1500/143.7000 -- R02 162.2 Hz / R02P 656
148.1250/143.5500 -- R03 136.5 Hz / R03P 555
148.1500/143.7000 -- R04 74.4 Hz / R04P 2E8
148.1250/143.5500 -- R05 79.7 Hz / R05P 31D
148.1500/143.7000 -- R06 71.9 Hz / R06P 2CF
148.1250/143.5500 -- R07 85.4 Hz / R07P 356
148.1500/143.7000 -- R08 67.0 Hz / R08P 29E
148.1250/143.5500 -- R09 156.7 Hz / R09P 61F
148.1500/143.7000 -- R10 192.8 Hz / R10P 788
148.1250/143.5500 -- R11 123.0 Hz / R11P 4CE
148.1500/143.7000 -- R12 173.8 Hz / R12P 6CA
148.1250/143.5500 -- R13 91.5 Hz / R13P 393
148.1500/143.7000 -- R14 167.9 Hz / R14P 68F
148.1250/143.5500 -- R15 69.3 Hz / R15P 2B5
148.1500/143.7000 -- R16 136.5 Hz / R16P 555
Zone 9 Analog / Zone 13 Digital
148.1250/143.5500 -- R17 82.5 Hz / R17P 339
148.1500/143.7000 -- R18 88.5 Hz / R18P 375
148.1250/143.5500 -- R19 94.8 Hz / R19P 3B4
148.1500/143.7000 -- R20 141.3 Hz / R20P 585
148.1250/143.5500 -- R21 141.3 Hz / R21P 585
148.1500/143.7000 -- R22 69.3 Hz / R22P 2B5
148.1250/143.5500 -- R23 71.9 Hz / R23P 2CF
148.1500/143.7000 -- R24 127.3 Hz / R24P 4F9
148.1250/143.5500 -- R25 107.2 Hz / R25P 430
148.1500/143.7000 -- R26 146.2 Hz / R26P 5B6
148.1250/143.5500 -- R27 146.2 Hz / R27P 5B6
148.1500/143.7000 -- R28 156.7 Hz / R28P 61F
148.1250/143.5500 -- R29 173.8 Hz / R29P 6CA
148.1500/143.7000 -- R30 97.4 Hz / R30P 3CE
148.1250/143.5500 -- R31 114.8 Hz / R31P 47C
148.1500/143.7000 -- R32 110.9 Hz / R32P 455
Zone 10 Analog/Zone 14 Digital
148.1250/143.5500 -- R33 88.5 Hz / R33P 375
148.1500/143.7000 -- R34 91.5 Hz / R34P 393
148.1250/143.5500 -- R35 97.4 Hz / R35P 3CE
148.1500/143.7000 -- R36 85.4 Hz / R36P 356
148.1250/143.5500 -- R37 151.4 Hz / R37P 5EA
148.1500/143.7000 -- R38 123.0 Hz / R38P 4CE
148.1250/143.5500 -- R39 162.2 Hz / R39P 656
148.1500/143.7000 -- R40 82.5 Hz / R40P 339
148.1250/143.5500 -- R41 103.5 Hz / R41P 40B
148.1500/143.7000 -- R42 77.0 Hz / R42P 302
148.1250/143.5500 -- R43 74.4 Hz / R43P 2E8
148.1500/143.7000 -- R44 114.8 Hz / R44P 47C
148.1250/143.5500 -- R45 77.0 Hz / R45P 302
148.1500/143.7000 -- R46 151.4 Hz / R46P 5EA
148.1250/143.5500 -- R47 167.9 Hz / R47P 68F
148.1500/143.7000 -- R48 131.8 Hz / R48P 526
Zone 11 Analog/Zone 15 Digital
148.1250/143.5500 -- R49 131.8 Hz / R49P 526
148.1500/143.7000 -- R50 103.5 Hz / R50P 40B
148.1250/143.5500 -- R51 100.0 Hz / R51P 3E8
148.1500/143.7000 -- R52 79.7 Hz / R52P 31D
148.1250/143.5500 -- R53 192.8 Hz / R53P 788
148.1500/143.7000 -- R54 100.0 Hz / R54P 3E8
148.1250/143.5500 -- R55 67.0 Hz / R55P 29E
148.1500/143.7000 -- R56 107.2 Hz / R56P 430
148.1250/143.5500 -- R57 118.8 Hz / R57P 4A4
148.1500/143.7000 -- R58 118.8 Hz / R58P 4A4
148.1250/143.5500 -- R59 186.2 Hz / R59P 746
148.1500/143.7000 -- R60 94.8 Hz / R60P 3B4
148.1250/143.5500 -- R61 127.3 Hz / R61P 4F9
148.1500/143.7000 -- R62 186.2 Hz / R62P 746
148.1250/143.5500 -- R63 203.5 Hz / R63P 7F3
148.1500/143.7000 -- R64 203.5 Hz / R64P 7F3
Under current NTIA rules, CAP is only permitted to utilize the frequency 123.100 MHz in “coordinated search and rescue operations” for liaison communications among air and ground stations from other agencies. CAP stations are not allowed to use 123.100 MHz for internal CAP-to-CAP communication, training, non-search and rescue missions or any other purpose. No other VHF-AM frequency is authorized for CAP ground station use unless requested and authorized by an FCC licensee.
CAP and the HF Radio Spectrum
As I mentioned in the April and July 2011 MT Milcom columns, the Civil Air Patrol (CAP) announced that they were creating new regional HF networks. here is the latest frequency list of the ten known CAP HF nets. Mode is USB and frequencies are in kHz.
Net 1 – Northeast Region: Connecticut, Massachusetts, Maine, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont
2374.0 4576.0 4636.0# 6773.0 7656.0 10557.0 12218.0 14914.0
Net 2 – Middle East Region: Delaware, Maryland, North Carolina, South Carolina, Virginia, West Virginia
2393.0 3385.0 4585.0# 4633.0 5447.0 7665.0 9082.0 12124.0 14445.0
Net 3 – Great Lakes Region: Illinois, Indiana, Kentucky, Ohio, Michigan, Wisconsin
2508.0 4591.0 4604.0# 7630.0 10504.0 12200.0 14438.0 18513.0 24553.0
Net 4 – Southeast Region: Alabama, Florida, Georgia, Mississippi, Puerto Rico, Tennessee
2511.0 4502.0 4630.0# 7704.0 10545.0 14424.0 16350.0 18205.0 20873.0 22862.0
Net 5 – North Central Region: Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, South Dakota
2371.0 4482.0 4505.0# 7341.0 10510.0 12098.0 14450.0 16353.0 20511.0
Net 6 – Southwest Region: Arizona, Arkansas, Louisiana, New Mexico, Oklahoma, Texas
2379.0 4512.0 4627.0# 7416.0 10550.0 12183.0 14457.0 16333.0 22872.0 26617.0
Net 7 – Rocky Mountain Region: Colorado, Idaho, Montana, Utah, Wyoming
2560.0 3160.0 4509.0 4601.0# 7618.0 10542.0 14430.0 18516.0 22875.0 24566.0
Net 8 – Pacific Region: Alaska, California, Hawaii, Nevada, Oregon, Washington
2525.0 4515.0 4582.0# 7637.0 10518.0 12177.0 16330.0 20508.0 24563.0 26620.0
# Primary region voice frequency.
National Networks - Net 9 (Voice Net) / Net 10 (Digital Net)
2011.0 3204.0 4477.0 5006.0 6806.0 7602.0* 8012.0 9047.0 10162.0 11402.0* 12081.0 13415.0 14357.0 15602.0 17412.0 19814.0** 21863.0 23006.0 25354.0 27546.0 29894.0
* Net 9 frequency
** Net 10 frequency
National Reserve Frequencies: 2205.0 4472.0 7615.0 14902.0
CAP Call Signs
Voice call signs within CAP including those assigned to the national headquarters, each region and each wing are assigned Air Force Voice Call Signs (AFVCS). These tactical call signs are suffixed with two numbers.
CAP corporate aircraft will use “CAP” (pronounced “kap”) call sign. Member-owned aircraft may also use a CAP call sign when on Air Force assigned missions (AFAM). Wings and regions use the first two digits for their region/wing vehicle identity numbers (see table 2).
Civil Air Patrol uses unique ALE addresses for identification during ALE operation.
Wing ALE addresses use the format “xxxxwgCAP” in which “wg” is the two-letter state postal code of the wing and “xxxx” is a four digit call sign number.
Region ALE addresses use the format “xxxregCAP” in which “reg” is the three-letter region designator and “xxx” is a three digit call sign number.
CAP headquarters ALE addresses use the format “xxxNHQCAP” in which “xxx” is a three digit call sign number.
The HF/ALE stations at the CAP national headquarters level have unique coordinated call signs and ALE identifiers. The National Headquarters station, located in the National Operations Center (NOC), uses the call sign Avenging Spirit and the ALE identifier AVS. NHQ/NTC uses the call sign Richmond and the ALE identifier RIC. It should also be pointed out that there appears to be USAF HF-GCS stations on CAP frequencies which uses the Billy Bear ## call sign.
2016 CAP Wing Call Sign Changes
In April 2016, CAP started making major changes to some of their wing call signs. Here were the published details regarding these changes from an open source CAP newsgroup:
"CAP uses radio frequencies assigned by the US Air Force. We also use tactical radio call signs assigned by the Air Force Voice Call Sign Program Management Office. Some 20 years ago, we went through a major reorganization to bring CAP into compliance. We were in compliance then, but changing requirements updated most recently by the Air Force in 2014 (AFI33-217) mean stricter limitations on call sign management. (Chief note: AFI33-217 http://static.e-publishing.af.mil/production/1/saf_cio_a6/publication/afi33-217/afi33-217.pdf)
What needs to change?
Current Air Force rules limit numerical suffixes on tactical call signs to two digits. In addition, they may not include any reference to Civil Air Patrol (CAP), acronyms, any part of a wing or unit name, abbreviations, phonetic alphabet, or spoken numbers (not including the authorized suffixes). They must consist of no more than two English words with a minimum of four and a maximum of 15 characters, including the space.
Note that the Air Force does not use tactical call signs on VHF-FM at all, so we MAY still use tactical call signs with up to four-digits on VHF-FM and ISR frequencies.
How are we going to make these changes?
We have several wings that include “CAP” in their tactical call sign today. A couple of wings have already taken steps to change their tactical call sign to remove “CAP”, including IowaCAP and CAP KittyHawk. DOK will be contacting those wings that need to change. These wings will be invited to submit several proposed compliant calls. The Voice Call Sign Program Management Office will start at the top of the list and work down until it finds an available tactical call sign.
The requirement to use no more than two-digit suffixes on tactical call signs used on HF is going to require serious planning in most wings. There is no magic answer, but here are some suggestions and considerations:
- We are well aware that the Air Force requirement for two-digit call signs on HF will disrupt many wing call sign plans which have blocks of call signs assigned to groups and squadrons. We will need new ways of managing our call signs.
- On HF, it is more important to know what station you are talking to than what member is holding the microphone. Therefore, we do NOT need to assign a two-digit tactical call sign to everyone who might ever need to use and HF radio. Our HF call signs need a lean focus.
- Most of our new generation of HF call signs will likely be assigned to stations, as opposed to individuals. We should plan to minimize the need for multiple call signs to be used on a single station/radio.
- An individual who has reason to have a two-digit tactical call for HF may still use it on VHF-FM channels. Similarly, at a given station, the two-digit station call can be used on HF, VHF-FM, and ISR. We discourage the idea of using different suffixes on different frequencies (but we know this may disrupt existing procedures that assign blocks of calls to units).
- Remember that a “squadron station” does not need to be located at the squadron headquarters. It could as easily be across town at the home of a member who can check into nets regularly, but also have VHF connectivity to the squadron location.
- Remember that in operational missions and ANY formal CAP activity, functional designators may be used instead of tactical call signs. This means that some locations, special Comm vehicles, Comm trailers, etc. may not need tactical call signs at all.
- The two-digit suffix rule also applies to ground-to-air and satellite use of CAP tactical call signs.
- If a large wing absolutely cannot make HF work with only two digits, there is a possibility of a second tactical call for the wing. In order for this to be approved, the wing will have to document persuasively why it cannot function with only one call sign.
- There is no magic formula for solving this compliance issue that will work for all wings, but wings should think mainly in terms of HF stations and not people.
2. Then evaluate other stations that you expect to be on HF regularly, such as your message center stations and your regular wing net stations.
3. We suggest that only after you have analyzed these station requirements should you consider any individual people who need one or two digit calls so they can be on HF.
Tactical Call Sign - Unit - CAP Aircraft Number -- ALE Address
Abenaki ## - New Hampshire Wing - CAP 28xx -- xxxxNHCAP
Aspen Gold ## - Rocky Mountain Region - CAP 97xx -- xxxRMRCAP
Avenging Spirit - National Headquarters Special Use -- AVS
Beaver Fox ## - Oregon Wing - CAP 36xx -- xxxxORCAP
Big Bend ## - Texas Wing - CAP 42xx -- xxxxTXCAP (ex-Texas CAP)
Billy Bear ## - CAP National Headquarters (CAP) / USAF HFGCS Stations
Black Granite ## - Montana Wing - CAP 24xx -- xxxxMTCAP
Blue Bird ## - Missouri Wing - CAP 23xx -- xxxxMOCAP (ex-Missouri CAP)
Blue Lake ## - Great Lakes Region - CAP 93xx -- xxxGLRCAP
Blue Mesa ## - Colorado Wing - CAP 05xx -- xxxxCOCAP
Blue Mound ## - Wisconsin Wing - CAP 48xx -- xxxxWICAP
Blue Sky ## - CAP National Headquarters (NHQ) - CAP 99xx -- xxxNHQCAP (ex-Head CAP)
Caldera ## - Washington Wing - CAP 46xx -- xxxxWACAP (ex-Washington CAP)
CAP #### - Civil Air Patrol Aircraft
Capstone ## - Northeast Region - CAP 91xx -- xxxNERCAP
Capital ## - National Capital Wing - CAP 25xx -- ex-Nat CAP
Charter Oak ## - Connecticut Wing - CAP 06xx -- xxxxCTCAP
Columbus ## - Ohio Wing - CAP 34xx -- xxxxOHCAP
Diamond Flight ## - Delaware Wing - CAP 07xx -- xxxxDECAP
Down East ## - Maine Wing - CAP 17xx -- xxxxMECAP
Firebrand ## - Hawaii Wing - CAP 51xx -- xxxxHICAP
Free State ## - Maryland Wing - CAP 18xx -- xxxxMDCAP
Goldenrod ## - Alabama Wing - CAP 01xx -- xxxxALCAP
Grassland ## - South Dakota Wing - CAP 40xx -- xxxxSDCAP
Grey Sky ## - Unknown
High Bird ## - CAP Radio Relay Aircraft
High Desert ## -- Utah Wing - CAP 43xx -- xxxxUTCAP (ex-Uncle Mike)
High Plains ## - Wyoming Wing - CAP 49xx -- xxxxWYCAP
Hill Sky ## - Congressional Squadron - CAP 25xx -- xxxxDCCAP (ex-NATCAP)
Jefferson ## - Virginia Wing - CAP 45xx -- xxxxVACAP
Landing Gear ## - Georgia Wing - CAP 09xx -- xxxxGACAP (ex-Georgia CAP)
Long Leaf ## - North Carolina Wing - CAP 32xx -- xxxxNCCAP (ex-CAP Kitty Hawk)
Long Trail ## - Vermont Wing - CAP 44xx -- xxxxVTCAP (ex-Vermont CAP)
Manatee ## - Florida Wing - CAP 08xx -- xxxxFLCAP (ex-Florida CAP)
Middle East ## - Middle East Region - CAP 92xx -- xxxMERCAP
Mockingbird ## - Mississippi Wing - CAP 22xx -- xxxxMSCAP
Moonshine ## - Kentucky Wing - CAP 15xx -- xxxxKYCAP (ex-Kentucky CAP)
Mudbug ## - Louisiana Wing - CAP 16xx -- xxxxLACAP (ex-Louisiana CAP)
Narragansett ## - Rhode Island Wing - CAP 38xx -- xxxxRICAP
North Central ## - North Central Region - CAP 95xx -- xxxNCRCAP
Oil Well ## - Oklahoma Wing - CAP 35xx -- xxxxOKCAP
Patriot ## - Massachusetts Wing - CAP 19xx -- xxxxMACAP
Peace Garden ## - North Dakota Wing - CAP 33xx -- xxxxNDCAP
Rattlesnake ## - Southwest Region - CAP 96xx -- xxxSWRCAP (ex-CAP West)
Red Cloud ## - Nebraska Wing - CAP 26xx -- xxxxNECAP
Red Dragon ## - New Jersey Wing - CAP 29xx -- xxxxNJCAP
Red Fire ## - Indiana Wing - CAP 12xx -- xxxxINCAP
Red Fox ## - Illinois Wing - CAP 11xx -- xxxxILCAP
Red Robin ## - Michigan Wing - CAP 20xx -- xxxxMICAP
Red Rock ## - Arizona Wing - CAP 02xx -- xxxxAZCAP
Rocky Top ## - Tennessee Wing - CAP 41xx -- xxxxTNCAP (ex-Tennessee CAP)
Sand Lapper ## - South Carolina Wing - CAP 39xx -- xxxxSCCAP
Ship Rock ## - New Mexico Wing - CAP 30xx -- xxxxNMCAP
Silver State ## - Nevada Wing - CAP 27xx -- xxxxNVCAP
Skyline ## - West Virginia Wing - CAP 47xx -- xxxxWVCAP (ex-Hill CAP)
Sourdough ## - Alaska Wing - CAP 50xx -- xxxxAKCAP
Star Fish ## - Minnesota Wing - CAP 21xx -- xxxxMNCAP
Star Garnet ## - Idaho Wing - CAP 10xx -- xxxxIDCAP
Storm Cloud ## - Puerto Rico Wing - CAP 52xx -- xxxxPRCAP (ex-Puerto Rico CAP)
Tornado ## - Iowa Wing - CAP 13xx -- xxxxIACAP (ex-Iowa CAP)
Triblade ## - National Traffic Net (NTN) Call Sign -- xxxNTNCAP
Western ## - Pacific Region - CAP 98xx -- xxxPCRCAP
White Peak ## - New York Wing - CAP 31xx -- xxxxNYCAP
Whitetail ## - Pennsylvania Wing - CAP 37xx -- xxxxPACAP (ex-Penn Cap)
Wild Wood ## - Arkansas Wing - CAP 03xx -- xxxxARCAP
Wire Head ## - National Headquarters Communications Staff
Yellow Brick ## - Kansas Wing - CAP 14xx -- xxxxKSCAP
Yellow Plane ## - Southeast Region - CAP 94xx -- xxxSERCAP (ex-Southeast CAP)
Yosemite ## - California Wing - CAP 04xx -- xxxxCACAP
Blog Editor Caveat: "Absolutely" no internal CAP classified sources were used to compile the frequency or call signs listed in this blog article. I don't have access to your stuff, and quite frankly I don't need it to put together an article of this sort. Maybe one of these days you folks will realize that it is a little hard to hide anything that transmits in the RF spectrum. If you are a dedicated radio listener you just have to be diligent and patient! So before the CAP communications community has a major hemorrhage and sends the Feds or their "lawyers" to knock down my door, the information presented in this reference page has come from open sources we found on various Internet websites and from other HF monitors in various parts of the country.