Hi, Just to add some lines to the conversation Navigraph produces high quality up-to-date FMS data for different flight sim add-ons and plane formats, but they are all for MS FS 2004 / X. They release an AIRAC cycle every 28 days much like in the real world where you can get them from Jeppesen or another company and they try to incorporate as many updates as possible. But in general you don't really need the latest of latest AIRACs all the time for simulation unless you are seriously flying online at VATSIM or IVAO and you want to have an up-to-date database every day of the month so that if a controller tells you to go direct to a waypoint you can follow it. A reasonably recent AIRAC is generally enough for me with an update once in a while, but this is a matter of personal choice. X-Plane comes with the excellent data compiled by Robin Peel and freely available at http://data.x-plane.com/ It is really good considering it covers the whole world, is totally free and is all maintained on a voluntary basis based on feedback given by users. So truth be told, Robin and his contributors deserve all the credit! The only drawback with it is when flying outside of the US, especially in Europe, where the X-Plane's data is not so up-to-date, simply because it is very difficult for someone by themselves to keep up with all the updates that happen in each and every country and that are published by each country's authorities. This is where Navigraph comes into being by providing this as a paid service. PSS_Native is one of the formats in which you can get Navigraph data for the set of PSS MS aircrafts I believe. The good thing about it is the "native" bit which means that instead of coming in an EXE it comes in raw text files which you can process, and potentially convert to X-Plane format. There are many formats in their page. Also, as far as I know, but I'm not absolutely sure and this might have changed since I last tried, once you purchase one AIRAC cycle which costs you 20 credits, you can download the other formats of the same cycle for free. So if you purchased AirTrack's I believe you can download the PSS set for free. On getting X-Plane data: Javier's UFMC used to come with a set of scripts to convert PSS_Native text files to X-Plane format. Not sure how well it works as I never tested it. Apparently the new CRJ-200 will come with the possibility of loading Navigraph data too, although I don't know it it will provide a script to produce X-Plane format data or have its own format. We'll soon discover And AirTrack, the iPad App, which I develop ;D, comes with X-Plane's data and a free demo dataset of the Navigraph's data (1006) and you can then decide to upgrade or not on a 28 day cycle basis. In this case we get the raw data from Navigraph and process it into AirTrack's own binary format which is then downloaded to the app once you enter the code, which is verified against the Navigraph's website. This format would however hardly be useful for X-Plane as it is a highly compact non-text / binary based format since we need to compact it as much as possible in order to make it run on 128MB RAM old iPhones and iPods. --- Creating the VOR, NDB, LOC, GS, .... and FIX files for X-Plane (earth_nav.dat and earth_fix.dat) might be difficult from the PSS as this format doesn't always include all bits of information required by X-Plane (just looking at it, VOR elevation for instance). But I just realized that I could produce these files easily as I already process them for AirTrack, so I'll ask the Navigraph folk if they're interested in them. AFAICS, creating the Airport data however would be almost impossible as the X-Plane's airport data file contains all the runways and taxiways which the Navigraph's doesn't, and it gets overwritten by custom sceneries. Still, having the navigation part for the FMC is what it is all about, so it could be at least possible. I'll ask them just my two cents, sorry for the long post, joao
