Air Traffic Control on Shortwave
 

Heard Nairobi airport on SSB mode in 11 Mhz band. I am surprised HF
is still used for ATC. I would think VHF would be the good mode of
transmission. Any ideas?

No VHF repeaters in the middle of the ocean ;-)

--
Gregg
*It's probably useful, even if it can't be SPICE'd*
http://geek.scorpiorising.ca

Gregg wrote:

No VHF repeaters in the middle of the ocean ;-)

Plus, you're talking about Africa, where they don't have the money for
stuff like VHF repeaters.

What frequency and time was that?

Sounds like a fun target.

jw
k9rzz
milwaukee

J999w wrote:

What frequency and time was that?

Off the top of my head I think Nairobi (along with others) might be on
11300 USB. Audible here in the evenings.

Steve
Holland, MI
Drake R7, R8 and R8B

http://www.iserv.net/~n8kdv/dxpage.htm

"tommyknocker" wrote in message
...
Gregg wrote:

No VHF repeaters in the middle of the ocean ;-)

Plus, you're talking about Africa, where they don't have the money for
stuff like VHF repeaters.


Actually, they DO have the money. It is collected from user charges - but as
usual this money is spirited away by what passes for Government in Africa.
Usually ends up in private bank account. As a result Air Traffic Control in
Africa is a joke!!!!

They have plenty of money, I get emails all the times telling me that this
guy or another has $25,000,000 that they don't know what do do with. I
should reply next time and tell them to spend a few million on fixing up
their country.


"tommyknocker" wrote in message
...
Gregg wrote:

No VHF repeaters in the middle of the ocean ;-)

Plus, you're talking about Africa, where they don't have the money for
stuff like VHF repeaters.

tommyknocker wrote:

Gregg wrote:

No VHF repeaters in the middle of the ocean ;-)

Plus, you're talking about Africa, where they don't have the money for
stuff like VHF repeaters.

We're talking long distance stuff here... the airports in Africa generally
use the same VHF frequencies as everyone else...

But once they are out of range of a particular airport, HF comes into
play.

In article VqOkc.5007$TD4.497014@attbi_s01,
"Jim Douglas" wrote:

They have plenty of money, I get emails all the times telling me that this
guy or another has $25,000,000 that they don't know what do do with. I
should reply next time and tell them to spend a few million on fixing up
their country.

They will come back and tell you they need a US bank account to fix up
their country. Be sure to give them all your personal information.

--
Telamon
Ventura, California

All jokes aside, it is interesting to note that ATC were talking to
Royal Dutch Airlines on that frequency. I guess aircrafts have VHF as
well as HF radios onboard.

Steve is right about 11300 kHz USB.

N8KDV wrote in message ...
J999w wrote:

What frequency and time was that?

Off the top of my head I think Nairobi (along with others) might be on
11300 USB. Audible here in the evenings.

Steve
Holland, MI
Drake R7, R8 and R8B

http://www.iserv.net/~n8kdv/dxpage.htm

Jim wrote:

All jokes aside, it is interesting to note that ATC were talking to
Royal Dutch Airlines on that frequency. I guess aircrafts have VHF as
well as HF radios onboard.

Royal Dutch Airlines (KLM) flies to Africa, they also have an extensive cargo fleet.



Steve is right about 11300 kHz USB.

N8KDV wrote in message ...
J999w wrote:

What frequency and time was that?

Off the top of my head I think Nairobi (along with others) might be on
11300 USB. Audible here in the evenings.

Steve
Holland, MI
Drake R7, R8 and R8B

http://www.iserv.net/~n8kdv/dxpage.htm

HF Air Traffic can be hear on the following frequencies in
my ares (Maryland):

3494 khz. 6640 khz. 8933 khz. 11342 khz. 13330 khz. 17925 khz.


Correct me if I'm wrong but I think these are
LDOC (long distance operation coordination ?)

HF Air Traffic can be heard on the following frequencies in
my ares (Maryland):

3494 khz. 6640 khz. 8933 khz. 11342 khz. 13330 khz. 17925 khz.


Correct me if I'm wrong but I think these are
LDOC (long distance operation coordination ?)

Correct me if I'm wrong but I think these are LDOC (long distance operation
coordination ?)

Back in pre-ssb days, a radiotelegrapher was part of an international flight
crew.

I believe they still give position reports. They may use "company" hf
frequencies, too.

Bill, K5BY