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ATC History

Old 7th Jul 2009, 01:34
  #221 (permalink)  
Join Date: Nov 1999
Location: Poole
Age: 73
Posts: 55

I am going back forty years to when I used such equipment. In those days we only used 64 codes (00 - 77 octal) not the present 4096. It was possible to dial in a code on the radar console and any aircraft squawking that code would be marked with a slash close to the primary radar return. Squawking Ident produced a second slash.

It was possible to view the actual code as a series of slashes or blanks between two lines called framing pulses. These slashes were very close together so good eyesight was required to read the code in this way.

These slashes were actually binary bits in two groups of 3.

The bits represent the values 1, 2 and 4 which, when added together can represent the numbers 0 - 7 depending which bits are on or off i.e. eight values (Octal)

It was a bit like reading a bar code as found on almost everything today.

The slashes could be read as follows. (- below means off i.e. invisible)

- - - equals 0
- - | equals 1
- | - equals 2
- | | equals 3
| - - equals 4
| - | equals 5
| | - equals 6
| | | equals 7

So the code 65 would look a bit like this ( the square brackets [] are the framing pulses.

[||- |-|]

I hope that this makes it as clear as mud!

Reg Ford
Honey Monster is offline  
Old 7th Jul 2009, 06:55
  #222 (permalink)  
Join Date: Oct 2000
Location: Berkshire, UK
Age: 75
Posts: 8,275
<<and I asked him about squawk idents. He started to explain why there are no 8's and 9's used in squawk idents. >>

"Squawk Ident" has nothing to with the number of codes. It is simply a feature of the transponder which, when activated, produces an indication on the radar tube for a few seconds to confirm the identity of the aircraft. Never press the "ident" button unless instructed to do so by ATC.
Old 7th Jul 2009, 12:57
  #223 (permalink)  
Join Date: Jun 2003
Location: bournemouth uk
Posts: 18
trident GARPE

yeh, i was on ONE South when PE taxied for EGAA to "rest". the dep was DTY SID off 10R and when I told twr to send him to me on t/o a few eyebrows where raised! the a/c was most surprised when he called me and I asked him if he'd like a fly down 10L. no hesitation and a superb low - I mean LOW - flyby done. quite a sight and a cracking memory
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Old 7th Jul 2009, 15:10
  #224 (permalink)  
Join Date: Oct 2002
Location: South West England
Age: 69
Posts: 202
The last DanAir comet

Does anybody else remember the last DH106 out of KK. On it's way to rest at Lasham the driver asked for an approach and low overshoot which was duly approved. At about 4 miles for 26 (there was no left and right then) he advised the ADC controller that the o/s would be from the North East to the South West. "Roger" said the lady controller. The Dan Air offices were in Horley and they were duly overflown as was the site of the future satellite and the new tower. Trouble was that the aircraft was clean and the throttles seemed to be stuck open. As he was approaching to land the 500ft bit of Rule 5 didn't seem to apply. Happy days!

We got into a lot of trouble for that one.

A I is offline  
Old 8th Jul 2009, 16:57
  #225 (permalink)  
Join Date: Jun 2001
Posts: 68
No 28 Cadet Course

Memories of 28 Cadet Course. It took just 3 months to turn us from this

to this

I'm the one with a hankerchief on my head!
Captain Windsock is offline  
Old 8th Jul 2009, 18:28
  #226 (permalink)  
Join Date: Jun 2002
Location: Surrey, Uk
Age: 68
Posts: 1,585
Captain Windsock.

I was on No 28 and took that second picture.
I think you should identify yourself. Send me a PM.

Mr_Grubby is offline  
Old 8th Jul 2009, 18:37
  #227 (permalink)  
Join Date: May 2000
Location: Living In The Past
Age: 72
Posts: 288
It might be my imagination , but in the first pic, it looks to me as though Willy M is glaring @ Mick B coz he got to sit next to the ladies ! Surely not ?
Eric T Cartman is offline  
Old 8th Jul 2009, 19:06
  #228 (permalink)  
Join Date: Oct 2000
Location: Berkshire, UK
Age: 75
Posts: 8,275
Look like rushes from Hammer Films to me!! Ivor's the only one with a respectable 'aircut!!! Is that Barry W too?

I've given a few of them grey hairs in my time!
Old 8th Jul 2009, 22:40
  #229 (permalink)  
Join Date: Jul 2004
Location: On the wireless...
Posts: 1,894
Ha! I recognise a few of that hairy lot, I think........subject to Alzheimers....

The Lovely Wendy MacDonald, Mr Grubby (Sober), Hobbsie (Sober), Parsons (Sober) (my old travel companion...), Bridget, Ivor (Old Father Thames), Weston (Chief of CAA Police), Culley Jnr (Oslo), Winch (Canada), Falloon (Channel Islands), Young.....

Musta been some serious drinking on that course....

Ah, Hello Nurse, time for my medicine..........
Talkdownman is offline  
Old 9th Jul 2009, 17:16
  #230 (permalink)  
Join Date: Apr 2008
Location: London UK
Age: 70
Posts: 46
28 Course

Hi Captain Windsock.

That's me standing behind Bridget, I was the better half......not.

I can't find myself on the lower picture, I must have got drunk and fallen down somewhere.

xpz67 is offline  
Old 19th Jul 2009, 23:28
  #231 (permalink)  
Join Date: Jul 2002
Location: London Area
Posts: 21
Great Photos, any more of old cadet courses, got 31's somwhere.
heathrow, easy life is offline  
Old 20th Jul 2009, 17:51
  #232 (permalink)  
Join Date: Aug 2005
Location: South Bucks
Posts: 2
Mr. Grubby

I am sure John Dancer was valid on TMA south, seem to remember he had an incident on South East, a level bust, in the stage half CCF days.
I was the GS spinning with D watch, they suspended me as well!!
Got a phone call later at home from the other JD to tell me I was not guilty

mobydickus is offline  
Old 20th Jul 2009, 19:11
  #233 (permalink)  
Join Date: Jun 2002
Location: Surrey, Uk
Age: 68
Posts: 1,585

OK, I could be wrong. It was a few years ago now !!!!

Mr_Grubby is offline  
Old 20th Jul 2009, 19:47
  #234 (permalink)  
Join Date: Dec 2007
Location: England
Posts: 86
I'll dig out 23 Cadet course photo for embarrassment.
The F111's stopped doing pd's after some sport one evening. These 2 decided that a quiet fly by of 28R wasn't enough so they did their party trick - dumped fuel then lit it!
2 a/c going very fast with a huge explosion and fireball behind them certainly got peoples attention. That was the last we saw of them and I guess they ended up flipping burgers when they got home!

windowjob is offline  
Old 20th Jul 2009, 20:56
  #235 (permalink)  
Join Date: Oct 2000
Location: Berkshire, UK
Age: 75
Posts: 8,275
Yeah..... half of Hounslow rung 999 - they thought there had been a nuclear explosion!
Old 20th Jul 2009, 21:04
  #236 (permalink)  
Join Date: Jul 2002
Location: London Area
Posts: 21
Young newly validated controller in the tower (Keith Meakin, thumper), now retired, had the fright of his life. It looked as though London had exploded, but to watch him running around answering phones from the world and his wife was a site to behold.
heathrow, easy life is offline  
Old 21st Jul 2009, 09:47
  #237 (permalink)  
Join Date: Mar 2002
Location: 51N
Age: 68
Posts: 44

Thanks for picking up that question . . . I was not in the room at the time but good to relive these moments.

Ah . . it was a Sunny early afternoon when SVFR req transit (yes it did occasionally happen . . S to N across the hallowed 28's).

Battle of Britain Flight from somewhere to somewhere and trying to save that all important Flight Time (or that is what they said) . . Fair play and why not !?

Sitting on Air which was probably bandboxed at the time - got the 10 mile to go check . . so starting to scan the skies . . no sign yet . . wait a mo, nothing on the DFTI . . um maybe stop Deps now . .

Try tilting the binos down a bit and . . . OHHH SH1T.

It was over in a flash (not quite F111 style) but the Lanc went over the TWR (Just) and the Spit and Hurricane split either side (about level with the rest room) . . . Brill.

Silence . . then an apt quip from the Lufthansa crew on the way to 28(L) then more silence.

There were a few calls from the 3rd floor on the matter but . .

Halcyon Days !!
India 99 is offline  
Old 22nd Jul 2009, 02:07
  #238 (permalink)  
Join Date: Jul 2001
Location: Ottawa, Canada
Age: 66
Posts: 181
If memory serves correct George Endersby was SATCO at West Freugh when I was unceremoniously dumped there in 1973
ex-EGLL is offline  
Old 22nd Jul 2009, 02:15
  #239 (permalink)  
Join Date: Jul 2001
Location: Ottawa, Canada
Age: 66
Posts: 181
Yup, that's me to next to Hobbsie

I am sure you were the start of my grey hair syndrome with the incessant yell of "More Jets"

ex-EGLL is offline  
Old 25th Sep 2010, 18:06
  #240 (permalink)  
Join Date: Sep 2010
Location: Dorsst
Age: 69
Posts: 3

I have just joined PPRuNe - I moved from LATCC to Lindhome in 1974 as an ATCA - great days - later I was a controller at Eastern - saw the civil bit close sadly!
colsmith is offline  

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