May 28, 2015 ChartData Released

The FAA updates data every 28 days (every 4th Thursday) and a new data cycle begins on Thursday.  We’ve now merged the FAA’s data with our proprietary ChartData and enabled downloads of the ChartData for that new cycle.

We update ChartData several days in advance of each cycle start date so you can download it early.  All US data was made available earlier today.

If you haven’t already done so, please be sure to update your ChartData before you fly.

  • In FlyQ EFB:  Tap the ChartData Manager icon (the “down arrow” icon) and review which states you have selected then tap Update Now.
  • In FlyQ Pocket: Select the Downloads tab on the bottom of the screen and tap Update Now.
  • For apps and devices that use our Data Manager, run the Data Manager (or select Settings from the little icon at the lower right corner of your Windows screen) and tap Update Now.
  • In Voyager, select Update Data from the Tools menu then choose the All Monthly ChartData item.

If you need to renew your subscription, click the appropriate link below:

Incremental Data Downloads

Ever since FlyQ EFB 1.0, FlyQ has done what we call “incremental downloads.”  That means that we only download new charts and maps that have actually changed each cycle, not charts and maps that have not changed.  That means that your first download takes a bit but subsequent downloads are very quick.

As an example, the FAA has about 17,000 approach plates, SIDs/STARs, MINs, and airport diagrams in their system.  Every 56 days they do what they call a “Book Cycle” (as in they publish a printed book) where about 10-20% of those documents change.  On the in-between 28 day cycle, only about 2 or 3% change.  When you download data from the ChartData Manager in FlyQ EFB, we know which plates have changed and download just those.  That saves a tremendous amount of time downloading the plates.

Similarly, although the FAA updates all IFR enroute charts every 56 days, the Sectionals, TACs, and WACs are updated either every six months or once a year and not all at once but in groups around the country.  Although the FAA does not provide Sectionals by state, we compute which states contain any part of a Sectionals/TAC/WAC that has changed.  We use that data to smartly download only the Sectionals for states that have any changes, not all states.  As Sectionals are large, this is a huge time savings.

Finally a note about the expiration date of the plates and airport diagrams:  If you’re checking for valid dates of the plate by looking at the side of the plate, you’re being misled. The FAA prints two dates on the side of each plate. Although they look like expiration dates, they are not. They simply represent the print cycle of when that plate was last printed by the FAA. That is, even if a plate doesn’t change for two years, every 28 days, it will have a new set of dates on the side. FlyQ ignores these dates and uses a database that the FAA publishes to download only the plates that really have changed or been added. Thus, even when all your plates are current, you may see ‘old’ dates on the side. You have to keep in mind that, unlike IFR enroute charts or Sectionals, there is no planned expiration date for a plate — they just update it when necessary. Thus, it’s not possible for them to print an expire date on the plate since they have no idea when it might expire.

Plates do have revision info on them in the lower left corner, however. This revision info remains constant even when the date on the side changes (unless the plate really was changed, of course) but it’s hard to decode as it sometimes involves what’s called a Julian date. Moreover, unless you know for sure what the “current” revision info is, it doesn’t help you much as there is nothing to compare it to. We all just have to rely on the FAA accurately marking plates when changed. The good news is that we’ve been doing this for 10 years and I’ve NEVER seen them make a mistake about this.

Finally, in the ChartData Manager, you can tell FlyQ EFB to download ALL plates, even the ones that have not changed.

Steve

Be Thankful

Although we know that war, starvation, natural catastrophes, and hardship is all around the world, we seldom see anything like it close up.  For most of us, our mornings are fairly uneventful.

For me, today has been anything but uneventful and I was reminded of how lucky I am when I woke at 5:20 AM to the sound of what I thought was a car alarm and early morning fog.  It wasn’t a car alarm or fog but a fire alarm from my next door neighbors’ house.  Their house was ablaze with smoke streaming out.  My neighbors and my family got out safely and my house was undamaged beyond a smoky smell but the neighbors’ beautiful house is no longer so beautiful.  It will need months of work to salvage.  The neighbors were in surprisingly good humor and understood that it was only “stuff” that could be replaced.  The difference between “stuff” and the ones we love is sometimes forgotten so perhaps this was a good reminder.

I’d also like to thank everyone who works as an emergency responder such as firefighters, police, and paramedics as I saw them in action this morning and it was very impressive.

Steve