Is CHP Blue Repeated? and CHP PL codes question

[mkewman]

I can't figure out if CHP BLUE is repeated in certain areas, or in all areas. Is it not repeated at all?

Also, This is a question i can't figure out,

Lets say theres a Pursuit that crosses a CHP Office Jurisdictional line, how do the two offices communicate? seeing as they have different PLs programmed in, i don't know how they would do it.

 

[digitaljim6]

Might be in some areas (39 MHz channels?) but I personally haven't heard blue repeated in the Nor Cal areas I travel.

As for the pursuit question, they hand off the frequencies just like they (usually) hand off the cars when the pursuit goes into another office area. The dispatchers have non-radio methods to coordinate between themselves so it's not an issue for them. In other words, a pursuit in south Sac may start on the black and then switch to the white if it goes south into Stockton's area.

When they hand off the cars, it gives them fresh vehicles, unending fuel and fresh officers, plus the local officers know their territories better so it gives them yet another advantage.

I can't figure out if CHP BLUE is repeated in certain areas, or in all areas. Is it not repeated at all?

Also, This is a question i can't figure out,

Lets say theres a Pursuit that crosses a CHP Office Jurisdictional line, how do the two offices communicate? seeing as they have different PLs programmed in, i don't know how they would do it.

 

[ScannerDude244]

Here in Monterey County it is I always hear Monterey CHP dispatch talking to the AIR or ground units on blue

 

[1979lee]

the chp blue , was used last week here in bakersfield, there was a pursuit that started in roseamond and ended at I5 and sr 166 it went from the desert to the southern valley ,
from sr 14 to sr 138 to I5 , went on for almost 2 hours and when they got close to the
I 5 they switched to the blue, then to the turquoise 42.600
in all they used the gold 42.120 , the tan 42.420 the blue 42.340 and finally the turquiose 42.600 , they dispatcher was asking if the southern blue would work with the central blue , and apparently it did.

 

[kma371]

I pretty sure it's repeated in all areas.

Well, the Chico, N Sac, S Sac, Stockton, and Truckee offices are all dispatched out of the same comm center AFAIK. So one dispatcher can easily tell the other dispatcher what's coming since they are in the same room.

I can't figure out if CHP BLUE is repeated in certain areas, or in all areas. Is it not repeated at all?

Also, This is a question i can't figure out,

Lets say theres a Pursuit that crosses a CHP Office Jurisdictional line, how do the two offices communicate? seeing as they have different PLs programmed in, i don't know how they would do it.

 

[RolnCode3]

I have heard a CHP chase come from Contra Costa to Solano, Yolo, then Sacto. They easily coordinate by just switching from dispatch to dispatch. While each dispatch center has its own PL tones, they (from the sounds of it) program the channels with the different PLs so they can move about from dispatch center to dispatch center. In other words, Bay Area guys have channels programmed with the PL for Sacto and other places, so they can talk when here.

This is probably also done so they can move around the State as mutual aid/reassignment without having to reprogram the radios. I have no insider info, so that's just a guess.

 

[hotdjdave]

154.905 MHz

All CHP units can communicate with each other using their VHF-hi radios on 154.905 MHz (no CTCSS); however, distance is limited. On the same radios, they can use the following interagency channels: CLEMARS (154.92 MHz), CALCORD (156.075 MHz), and NLEMARS (155.475 MHz). However, when they do this on the "no CTCSS" channel, the dispatch cannot hear what is going on.

I hear, and have physically seen, CHP units in Los Angeles/SFV routinely using 154.905 to communicate unit to unit (car to car). They coordinate what unit will approach a vehicle, one unit stopping one vehicle and telling the other unit to pull over another vehicle, one unit responding to one traffic collision (TC) and telling another unit to continue on to the next TC down the road, coordinating "round robin" maneuvers to remove debris from roadway, warnings about roadway conditions or obstructions to nearby units, etc. By the way, I hear them call each other by the officer's first name when using this channel. This is all in the car, in addition to when they get out of their car and use the mobile extender at a scene.

 

[cristisphoto]

CHP Blue

The last time I heard the CHP Blue was in the daytime
Sounded peaceful
KInd of like a practice as so to speak or survelience who knows lol
However the last time I heard ANY CHP aircraft was in a persuit aaand they
they transmting too the Vehicle directly IE SAn Francisco is 42.44 and thats whom/ the chnanel they were using.

 

[SCPD]

I recently heard a pursuit that started in the Newhall area office of CHP and they kept it on the Tan while in their own area. Once the subject traveled into another area office's jurisdiction the dispatcher announced the pursuit would switch to blue. I followed this pursuit quite closely as I was only 2 minutes ahead of it in the Sylmar area. Since the difficulty of adjusting to city driving hits me when I leave the 14 and merge onto I5 near Sylmar, I wanted to know if and when I should just throw in the towel and park on the shoulder. Turns out I took the southbound 405 about the time the subject turned onto the 215 and I didn't have to contend with urban driving and a pursuit simultaneously.

The original question of how units continue on the Blue when they travel from one division with its PL tone to another division and a different PL tone is one I've had for many years. In the past I don't think the blue had a tone, when the radios were only capable of two or three channel operation. With the present radios I've assumed the Blue is programmed into the radios with all the divisional tones and would have a label similar to "Blue Southern" and "Blue Border" and such. It would seem they would have to, not so much for pursuits, but for out of division responses by officers to major incidents.

It seems like the longest pursuits I hear CHP having end up in Bakersfield. Often they start in southern California and end up on I5 in the southern Cental Valley. But then again this may be one of those urban legends like tornadoes steering towards trailer parks.

 

[RolnCode3]

If you have PL search on, you will see that when they broadcast, they have a PL attached (on the Blue).

 

[KMA367]

Well, the Chico, N Sac, S Sac, Stockton, and Truckee offices are all dispatched out of the same comm center AFAIK.

I don't believe so. If I'm not mistaken, CHP has 24 dispatch centers in 8 divisions, and my understanding is that

* Chico Dispatch Center handles Chico, Oroville, Yuba-Sutter, Williams, and Willows offices.

* Sacramento center dispatches Grass Valley, Auburn, Placerville, N Sac, S Sac, and Woodland offices

* Truckee Dispatch Center does Truckee, So Lake Tahoe, and Gold Run

* Stockton dispatches Stockton, Tracy, Amador and San Andreas

I've been wrong before though. I've never heard 42.34 repeated in the Northern Division areas I've lived in or passed through.

 

[digitaljim6]

I concur with Harry.

Never heard Blue repeated in this part of the state.
The dispatch centers are as he states below.
"Merced" handles Merced, Modesto, Sonora, Madera, Mariposa and Los Banos
"Fresno" handles Fresno.

I don't believe so. If I'm not mistaken, CHP has 24 dispatch centers in 8 divisions, and my understanding is that

* Chico Dispatch Center handles Chico, Oroville, Yuba-Sutter, Williams, and Willows offices.

* Sacramento center dispatches Grass Valley, Auburn, Placerville, N Sac, S Sac, and Woodland offices

* Truckee Dispatch Center does Truckee, So Lake Tahoe, and Gold Run

* Stockton dispatches Stockton, Tracy, Amador and San Andreas

I've been wrong before though. I've never heard 42.34 repeated in the Northern Division areas I've lived in or passed through.

 

[Sector051]

I recall 'eons' ago (Late 60's &1970's) when I live in Carson City, Nevada, CHP Tuckee and NHP (Nevada Highway Patrol - Carson) would routinely talk to one another on the Nevada low band frequency. I was actually rider one time with a NHP officer when Truckee asked NHP if they could check and stand-by at a reported accident scene in California until the CHP officer could get there.
Back then all NHP radio traffic for the entire State (with the exception of Las Vegas I couldn't hear) was repeated on VHF, and many of the smaller townships throughout Nevada used or shared the NHP frequency together, which made it possible for me to virtually know what was going on in the entire rest if the state. Back then a lot of the smaller township base stations talked to each other. I could hear Tonapah call or answer Las Vegas but never was able to hear Las Vegas NHP broadcast. Now I've recently learned that NHP went trunked and is all screwed up, at least initially when they first implemented it... Just a little trivial history that I thought some of you could appreciate from days of old when things such as police radio broadcast, like everything else was so much simpler.While progress has its advantages, often times I wonder if it truly is.

 

[inigo88]

I have never heard the BLUE repeated in Northern California, only remote base operation between the mobiles and the appropriate dispatch center. The BLUE2 on the other hand, specifically BLUE 2 Southern Division is repeated (or at least was for a pursuit back in September).

I believe in the process of replacing the infrastructure and changing the frequencies in Southern Division they added this feature.