133.875 MHz

[adamsdawson]

Hey yall, i am new to scanning air craft here. Just wanted to now if 133.875 MHz AM is some sort of net frequency for air craft. I here a lot of talking on it. Thanks. dawson.

 

[SCANdal]

Yet another...

dawson,

I am a reletive aviation newbie myself, but your question can't really be answered as asked since it's missing any real detail. Where are you hearing this "talking on it"? What type of talking are you hearing? Does it appear to be from aircraft or a base station or both? 133.875 falls in one of two air band frequency ranges used for ARTCC high sectors (132.025 to 135.975, and the other being 118.000 to 128.825). Perhaps you can fill us in with more...

SCANdal

 

[EMD91123]

133.875 covers 2 areas that I know of. It is a high level frequency for ATC just north of Detroit Michigan(CLEVELAND ARTCC) and it is also a high level frequency for ATC just to te west of Jacsonville Florida(Jacksonville ARTCC). Dont know if you may live near those two areas mentioned ???

 

[adamsdawson]

yes it is air craft. yes i do live in that area. Hamilton County.

 

[EMD91123]

Some others to plug in are

CLEVELAND ARTCC SUPER HIGH-126.525,120.325,120.075, and 133.525
CLEVELAND ARTCC HIGH----------119.325,127.675,135.725,134.775,and 134.775
CLEVELAND ARTCC LOW----------127.7,134.65,132.45,132.25,126.975,127.9,126.75

 

[Raptor05121]

Is it still active?

 

[w0fg]

Ahhh...it's an ARTCC frequency. It's always active.

 

[adamsdawson]

dumb question what is ARTCC?

 

[Raptor05121]

Air
Route
Traffic
Control
Center

We're currently under ZJX (Jacksonville Center). It where all the airliners and aircraft over FL180 are in contact with high-altitude ATC.

 

[adamsdawson]

aaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhh

 

[immelmen]

It where all the airliners and aircraft over FL180 are in contact with high-altitude ATC.

Centers also often work under class A to the floor of class E airspace(in areas not served by a nearby approach control), which in the eastern part of the US goes down to 1200 AGL outside of class B, C, and D. it goes even lower around non-controlled fields with published instrument approaches. Shoot an approach into an isolated airport when the tower is closed and Center is the one issuing the clearance (no separation provided)

 

[K4DHR]

Shoot an approach into an isolated airport when the tower is closed and Center is the one issuing the clearance (no separation provided)

That's not 100% correct. Even if the tower is closed, the center has responsibility for separating IFR aircraft, although their radar capabilities may be more limited. In an area with a part time approach control, the ASR at (or nearby) the field may feed into the center when the approach control is closed to continue to provide radar services.

If you're on an IFR flight plan, there is ALWAYS someone providing separation services. Even if it is nothing more than someone looking at a board of flight progress strips and making notes when an airplane passes a certain fix.

 

[immelmen]

That's not 100% correct. Even if the tower is closed, the center has responsibility for separating IFR aircraft, although their radar capabilities may be more limited. In an area with a part time approach control, the ASR at (or nearby) the field may feed into the center when the approach control is closed to continue to provide radar services.

If you're on an IFR flight plan, there is ALWAYS someone providing separation services. Even if it is nothing more than someone looking at a board of flight progress strips and making notes when an airplane passes a certain fix.

Not really what I was talking about....I mentioned isolated or un-controlled fields with no RAPCON nearby, ie: E or closed D with no radar coverage.

but I guess I should have been more specific, because the shrimp boats/strips only help so much at such locations. At an outlying, uncontrolled field out of radar coverage, the center controller can only provide IFR separation from other IFR traffic, not VFR traffic. Keeping the airspace "protected" is accomplished by only allowing one aircraft to execute an approach to the field at a time, holding other IFR arrivals off the marker until the cleared flight cancels on the ground or completes the missed. but they have no idea about the doctor in his bonanza is scud-running VFR up the valley....and cannot provide IFR flights with separation from him.

The FAA ATC handbook explains ATC is only generally responsible for separating IFR from other IFR, traffic advisories are "additional services" dependent on workload/facility limitations. At an isolated field, it would not be possible.