Air Traffic Control A couple months ago my flight to Chicago had a medical emergency and we had to land in Cleveland to drop off a passenger. I decided to listen to Air Traffic Control (ATC) which is a feature offered by United. I found it pretty interesting and not at all like what you see in the movies.
One thing to note is that ATC is made up of several independent divisions. Here is a brief summary of all the divisions that my flight passes through on its way from Hartford to Chicago:
- Taking off from Hartford we start with the Tower, which provides runway conditions and clearance for take-off.
- Once the plane leaves the ground, we contact Departures which coordinates which way the plane turns and what bearing and altitudes it should take.
- Once clear of the airport, we contact Boston Center to coordinate regional traffic, altitudes and
flight conditions
- Leaving the Northeast and passing through North Central, we contact Cleveland Center
- Leaving North Central and crossing over the Canadian border, we contact Toronto Center
- Crossing back into the US, we contact Cleveland Center again
- Approaching the Chicagoland area, we contact Chicago Center
- Approaching O'hare, we contact Chicago Approach for headings and runway assignment
- After receiving runway assignments and headings, we contact O'hare Tower for clearance to land
- Once we've landed, we contact O'Hare Ground for taxi and gate routing.
Below is a transcript of radio chatter from my flight, United 719. This starts soon after we contacted Cleveland Center. It's interesting to hear all the different people talking. For instance some people are friendlier than others and some have thick accents, like Korean 360 which obviously had a Korean pilot. It's also interesting to hear them announce "traffic" when routes intersect or run parallel within 2000 feet of elevation.
Numbers are constantly tossed back and forth and may refer to flights, speeds, headings, altitudes or radio frequencies. Sometimes they say the whole number and sometimes they read out the digits. Jargon is also pretty common, for instance saying puddle to refer to a puddle-jumper, a small propeller driven plane for short regional flights or heavy when referring to jumbo jets or cargo planes. They also use words to call out letters for instance Quebec for Q, Foxtrox for F, etc, particularly on the ground where every taxi-way and runway has a specific letter and number designation (more on that some other day). So it requires a basic understanding of what's going on and a good ear to figure things out sometimes.
One thing you can't see in this transcript is how crazy things get near Chicago where the traffic and congestion mean constant radio chatter. The radio is always on with updates from dozens of flights and you never know what you're going to hear when your crew switches channels. I really feel for the ATC controllers that have to work at O'hare. I actually heard pilots saying "Unbelievable!" to the ground control after having to back-track a route to get to their gate. The controllers have to be on top of things and there's very little breathing room with so much traffic and thousands of lives in their hands. My hat goes off to them.
...
(UA719) Cleveland Center we're experiencing moderate chop at 3-6.
(CleC) United 6, conditions?
(UA6) light chop last four minutes
(UA719) How is 4-0-0?
(CleC) light chop reported but that was 20 minutes ago
(UA719) Trying 4-0-0
...
(CleC) United 7-19, Status heading up there?
(UA719) It's been continuous chop all the way, United 7-19
...
(UA719) 7-19 now picking up light turbulence at 3-8-0
(CleC) Puddle 6-60, how is it where you are?
(660) at 3-6-0 had some chop while we leveled out but it's better now
(CleC) United 7-19, Puddle 6-60 says 3-6-0 is better now
(UA719) Going to 3-6-0 United 7-19
(CleC) United 7-19, Toronto Center says 3-60 should be a pretty nice ride soon
(UA719) Appreciate you checking for us, United 7-19
(CleC) 7-19, contact Toronto center 3492
(UA719) Toronto 3492, United 7-19
...
(UA719)Toronto Center, this is United 7-19 at 3-6-0 experiencing light chop
(TorC) United 7-19, hello, that should clear up for you in a little bit, it gets better as you head west
(UA719) Thanks
...
(TorC) United 7-19, traffic at 12 o'clock 1000 feet below
(UA719) Traffic ahead, United 7-19
...
(TorC) United 7-19 contact Cleveland Center 1-2-6-5-2
(UA719) 1-2-6-5-2 Cleveland, United 7-19
...
(UA719) Cleveland, United 7-19, 3-6-0 finally smooth
(CleC) 7-19, what was your condition?
(UA719) Well, it was 100 miles back, continuous light chop
...
(CleC) United 719, maintain 3-4-0
(UA719) 3-4-0, United 7-19
...
(CleC) United 719, contact Cleveland Center 1-3-3 dot 8-7
(UA719) 1-3-3-8-7, 7-19
...
(UA719) Cleveland Center, United 7-19 at 3-4-0
(CleC) United 7-19, maintain 3-2-0
(UA719) 3-2-0, 7-19
...
(UA719) United 719, at 3-2-0
(CleC) 7-19, Roger, no complaints
...
(CleC) United 7-19, descend at discretion, maintain 2-0-0
(UA719) with discretion, maintain 2-0-0
...
(CleC) United 7-19, contact Chicago Center at ????
(UA719) ????, United 7-19
...
(UA719) Chicago Center, United 7-19 descending to 2-0-0
(ChiC) United 7-19, 2-0-0
...
(ChiC) United 7-1-9, cross fire ??? at 0-0-niner thousand
(UA719) Cross fire at 9000 feet, united 7-19
...
(ChiC) United 7-1-9, contact Chicago Approach, 1-1-niner-0
(UA719) 1-niner-0 7-19 g'day
...
(UA719) Approach, United 7-19 at niner thousand
*lots of stuff*
(ChiA) bonzo?, United 7-19
...
(ChiA) United 7-1-9, descend and maintain 7000
(UA719) 7000, 7-19
...
Of course we had to turn off all electronics after this so that's all I could get.
Posted 06/25/2009 10:14 PM in Chicago, Geek Stuff, Hartford, Ramblings, Travel, Who knew?
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G1 Power User Group Journal Entry 5 App Updates:
- Touchdown | Uninstalled | Free Trial expired and I can't justify spending the money for Exchange connectivity.
- Toggle Settings (Cupcake) | Updated | I discovered that the new version can put a shortcut into the status bar which means that changing settings can be accessed anytime you can see the status bar instead of having to go to your home screen.
Social Apps
- Droid Twitter | Installed and Uninstalled | This is a bare bones TWitter client that just provides a tweet form and your lastest post. When entering tweets, it doesn't count your characters and the last tweet display only shows about 50 characters. The app is described as being focused on quickly submitting tweets however it fails because the app does not automatically log you in so you have to hit login every time you start the app (though it does remember you login info). It is also ad based so at the bottom of the screen there are always ads. Lastly, the splash screen is always showing up when you do things which is annoying. I think that an app can be speed oriented but still follow good usability concepts and I think this app fails at it's own purpose.
- Twitta | Installed and uninstalled | A simple, pleasant looking app for reading your latest tweets and submitting a new tweet, all conveniently located on a single screen. Once you log in, it saves your information and brings you to your main page. From there You can reply, direct message or visit someone's Twitter page as well as open in-line links in a browser and quickly link to in-line @ replies. My complaints are that the tweet form is very small making it difficult to see everything you've typed and the button is tiny making it hard to submit. The display screen is attractive but apparently downloads a ton of historical tweets and doesn't provide a scroll bar to quickly navigate or tell you where in the list you are. In settings you can customize the polling interval and notifications of new tweets. The one downfall of this is that it notifies you when YOU have submitted a new tweet as well which is a bit silly.
- Twit2go | Installed | Another pleasant looking app for Twitter. Once you log in, it saves your information and brings you to your main page. From there you can reply, direct message or visit someone's Twitter page. It does not support direct browser links nor does it automatically link @ replies. In settings you can change font size and set up notifications for any replies or direct messages, but it does not notify you of regular tweets. The strength of this app is the tweet form which shows your whole message and character count, but also supports URL shortening and picture tweets. These features alone may make it worth keeping, they just need to add in-line support of @ replies and browser links.
- Twidgit | Updated | I got this new version and it seems to be much better than the old widget which was unstable. Now, if you attempt to launch it, it tells you how to add it as a widget instead of showing an error. It now shows your last 10 tweets, instead of just the last one and handles connectivity issues much better. The tweet form is simple but done right; it's attractive, shows your entire message, counts your characters and has nice big cancel and submit buttons. I think this app will be the one I keep b/c it's handy having a widget on the home screen instead of having to launch a new app.
- Pintail | Installed | This is a nice locator app that will allow you to track where you phone is if you lose it. You choose a PIN and if you text the PIN to your phone, the phone will respond with the location determined by Google Maps. Alternately, you can give your friends the PIN and they can text you to find out where you are. The main problem with this is that if GPS is not activated, then it can only give you cell tower accuracy, so when I tested this, "1,956m from Windsor Locks" isn't that helpful if you're trying to locate a lost phone.
- Google Latitude | Installed | This is not an Android app per se, but Google Maps on Android supports Google Latitude which is a locating application you can sign up for from Google Labs (or on your iGoogle page). When combined with an Android phone, it allows your friends to see where you are on Google Maps based on your phone's GPS or cell tower location. Google Latitude allows you to control who sees this information so random people can't use it, only you friends that you've given permission to.
- FaceBook Lite | Installed | A simplified version of the FaceBook page with fewer options and javascript based functionality.
- FaceBook Sync | Installed | This app logs into your FaceBook account, compares your friend list to your phone's contacts and for any matching names, it downloads their FB profile picture and saves it as the contact picture on the phone. Allows you to conduct an optimistic search so matches dont' have to be exact. Optimistic search can results in many false positives and you don't have the option of reviewing/approving the matches. Decent app, but you only need to run it once, then you can uninstall it, not a very good model for customer retention.
Travel Apps:
- Where | Installed | I decided to try this app after reading good feedback from other power users. I like this application alot as it gives you quick access to things that are available near you, whether it be Starbucks or ZipCar or Yelp restaurants or just your local Yellow page listings. I like that it gives you weather as well.
- Places Directory | Installed | This is Google's answer to Where. It's a little similar and not sponsored by specific vendors, it just gives you straight local listings from Google based on your location. Not as slick as Where, but the results should be a little less biased.
Posted 06/15/2009 09:13 PM in Geek Stuff, Reviews, Work
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Wine Shelf Pictures Well, I finally posted my pictures from the wine shelf I built! Enjoy the (very) brief DIY.
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Posted 06/11/2009 10:37 PM in DIY, Pictures, Woodworking
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G1 Power User Group Journal Entry 4 Apps:
- Android 1.5 Cupcake Update | Installed OTA
- After installation, home screen was blank and SIM card did not work. Had to re-start the phone again before it behaved normally.
- Phone now multi-tasks when on a call. Before, you couldn't access your contacts or apps while on a call, but now you can.
- New auto-rotate and UI improvements such as transitions are nice, but you have to activate some of them and some apps and functions don't support it yet
- "My Downloads" in Market doesn't register some apps correctly so apps that I already have are shown as "Free" instead of "Installed." As a result I updated several apps and I don't think they changed.
- Camera response is faster, which makes for better pictures and video is now supported. Have not tried any of the direct upload features yet
- Support for widgets (mini apps that run directly on your home screen) is nice but right now they are mostly all calendars and weather. Hopefully there will be more creative widgets soon once Cupcake is fully rolled out. To add a downloaded widget to your home screen, press and hold in a blank area or hit menu on the home screen and you can add
- Voice search is nifty, you can speak into the microphone instead of typing
- In certain apps, if trying to move through text you've typed, it accelerates the scroll ball and starts scrolling through words instead of letters when scrolling quickly.
- Support for folders on the home screen is nice since I'm running out of space. Press and hold in a blank area or hit menu on the home screen and you can add a folder, then drag shortcuts into it.
- I noticed that Google Talk is now separate from IM and looks a little better
- I heard that the new Rogers (Canada) Android phone will have MS Exchange ActiveSync support, but it will not be coming to the G1, which means we would have to buy an app for it. Boo
- QSearch | Uninstalled | Not needed with Cupcake soft keyboard
- Toggle Settings | Uninstalled | Non-Cupcake version would crash every time I opened it
- Toggle Settings (Cupcake) | Installed | Free | Much nicer looking version with color icons, works pretty much the same but you can now add a shortcut to the notification bar so you don't clutter your home screen. It also supports profiles like "Home" or "Work.". Individual profiles are not customizable yet but you can set rules that say "If battery is less than 30%, use 'Low Battery' profile"
- Nesoid Lite (NES Emulator) | Installed & Uninstalled | Free | Demo version only comes with a Chip 'n' Dale Rescue Rangers ROM to showcase how well the emulator performs. This was enough to convince me to buy the full version.
- Nesoid (NES Emulator) | Installed | $1.99 | Allows you to download and use any NES ROM from the SD card. Has ZIP support so you can directly use zipped ROMs without having to unzip them. Found Super Mario Bros, Contra and Ninja Gaiden ROMs on-line and they work pretty well with some occassional degradation or lag in sound. Overall pretty impressive although using the keyboard to control isn't as nice as a dedicated game controller.
- Bio Lines | Installed and uninstalled | A puzzle game that requires you to connect 5 in a row to clear the board, but there are always more coming. It's kind of slow and can get boring so I got rid of it.
- Twidget | Installed and Uninstalled | Widget to display the latest tweet from your feed on your home screen and quickly send tweets. This widget seemed to freeze a lot since I was in a bad reception area and travelling alot. The refresh's didn't seem to time out so it would say "Loading" all the time. It eventually crashed and affect the Android system as well. Even after I removed the widget from my home screen, I would get errors so I had to uninstall it.
- Binary Clock | Installed and uninstalled | Simple clock displayed in binary, except that it displays each digit separately, (e.g. 15 is displayed as 1 and 5, each in binary, instead of 15 in binary). Uninstalled due to this.
- Binary Clock Widget | Installed | Widget that replaces the standard home clock with a binary clock, good for confusing people (there are only 10 types of people after all, those who understand binary and those who don't). Unlike the Binary Clock App this one can display binary for each digit or for the whole number. It does seem to slow the phone a little bit though.
Posted 06/10/2009 10:42 PM in Geek Stuff, Reviews, Work
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Good news! Futurama is coming back! Yee ha! Just like Family Guy, strong DVD sales and fan support has brought back yet another show canceled by Fox.

Posted 06/09/2009 06:40 PM in Geek Stuff, TV
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