Bom dia ! Sabah-el-jasmin ! Bonjour ! Hello ! Ciao ! Καλιμερα ! - -French version Virtual skies : ) is a website for flight simulation fans. shares with the community pinpoint data for free. We propose link to selected external data and we provide our own material to enhance your virtual flight experience, always nearer from the reality. says flight sim as a lot to do with the pilot in command who may adopt the adequate behavior in every circonstance, even if the aircraft hasn't all real-world capabilities simulated.

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Updates :

10 JUNE 2017 : creation of the IXEG corner
17 Nov 2017 : MJC8 procedures update, Negative Screen tutorial
10 June 2018 : IXEG corner expanded (Speedy Copilot, Minoan livrery)
18 August 2018 : LFPO 2018 for X-Plane
7 October 2018 : main page splitted with a new scenery page and a new aircraft corner page.

The IXEG Corner has moved !

You might also have a look at the french version of this page. Flight planning

OFP : planning sheets

TransaTvia.comHere you can find Operationnel Flight Plans templates to prepare your flight in several X-Plane and FS/Prepar3d add-ons.

To prepare your flight : review the data tabs (fuel & weight for instance). Then when it is ready, go the "Briefing" tab. Please sign it to complete the OFP automatically with the captain notes (OpenOffice Macro). In the end, export the dispatcher briefing as a selection in PDF if you wish.

Beware that the very last add-ons and versions of those sheets are only included and integrated in our plannig tool YART, Yet Another Route Tool, where they are dynamically produced from your flight data.

 |  | OFP Airbus A300 B4-200
 |  | OFP Airbus A320-200 CFM56-5B (v.2015.02 - with Aerosoft data)
 |  | OFP "A320 Master Series" (FSL A320)

 |  | OFP Boeing 727-200 ADV (retro)
 |  | OFP Boeing 737-200 Original
 |  | OFP Boeing 737 CL
 |  | OFP Boeing 737 NG (v.4)
 |  | OFP Boeing 747-400
 |  | OFP Boeing 757-200/300
 |  | OFP Boeing 767-300ER

 |  | OFP Boeing DC-9-81 (MD81) by Coolsky

 |  | OFP Dash-8 Q400

 |  | OFP BAe 146 (prévision de carburant manuelle)
 |  | OFP Avro RJ (prévision de carburant manuelle)
 |  | OFP Embraer 175 and 195
 |  | OFP Douglas DC-8 (JT3D)
 |  | OFP Boeing MD81
 |  | OFP Beechcraft 1900C/D
 |  | OFP Pilatus PC 12

Format is OpenDocument Template and should work better with Apache OpenOffice. Preview 1 Preview 2

You might export into PDF the summary tab of each sheet with the Apache OpenOffice PDF extension (see below).

Civil aviation data

EU-OPS : European legislation (CE) n0 859/2008 from the Commission (20/08/2008) about technical rules and administrative procedures in the commercial transport by plane.

French IFR and VFR charts : French AIP ©

Terminal charts in the United-States of America : DTPP at .

Worlwide navigation data on map :

EGNOS airports list : EGNOS european portal .
The already operational European Geostationary Navigation Overlay Service (EGNOS) is Europe’s first venture into satellite navigation and paves the way for Galileo, Europe’s independent global satellite navigation system. As a satellite-based augmentation system (SBAS), EGNOS improves the accuracy of basic satellite navigation signals in Europe such as those from the USA’s Global Positioning System (GPS). This makes GPS suitable for safety critical applications such as aviation or maritime navigation.

Flight plan validation

European flight plan guidelines (from French AIP) : Download and save. (1st April 2014 edition)

If have a basic EuroFPL account, you can validate your flight plan using this company tool. The form below can be used to redirect your flight plan directly on EuroFPL website, which gathers the Eurocontrol validation for you.

Eurocontrol Route Availability Document (RAD) . Error codes . CFMU (including european flight plan validation) at Eurocontrol Operations Portal

Eurocontrol ICAO Flight plan guide, suitable flight levels per French law ("Code de l'aviation civile",

Fuel efficiency, ECON speed and cost index (CI)

Economical speed is calculated using a cost index which allows balance between time of flight and consummed fuel. The CI is defined as the quotient of all time-dependants factors over the fuel price.

In 2012, the average fuel price was 310 cts/gal. The density of jetA-1 fuel is 6,6 lb/gal so fuel price was about 47 cts/lb. Divide time-related exploitation costs by this value. For instance : 1700 $.h-1 / 46,7 cts.lb1 = 36 (about).

Among several sources on the web, you'll find that exploitation cost (excluding fuel cost) is variable. It sounds normal as this cost is influenced by multiples parameters. Think of the age of the aircraft, airline economical model (including bying or leasing aircraft, level of customer services, maintenance strategy) or airports fees and so on.

Using two different and concording sources, we previously used 1700 $ per hour for our B737NG. This cost may be a strategical and confidential data for most airline managers but a small search on the Internet may lead you to a better overview of the possible values. The calculation here provides CI36, which is exactly the CI-value used by some european carriers in 2012.

When fuel price rises, the according reduction of the CI will maintain an economical efficiency while operating the airplane. Indeed, entering a low CI in the flight computer orders a slow ECON speed, thus the plane is consumming less fuel. On the other hand, if exploitation cost increases (salary augmentation, aging aircraft kept in service...) CI rises. Setting a high CI in the flight computer allows to fly faster, thus minimising the time of flight.

Fuel prices updated each week

AirBP aviation fuel catalog. Fuel Conservation Strategies: Cost Index Explained Utilities

Flying at night

I use a dual screen setup. On the left hand side screen, I display the charts, but when flying at night LIDO charts from Aerosoft are very bright while on the front screen it is dark. To reduce this violent contrast I boot Negative Screen, and select only my chart screen to be inverted.

Transatvia.comTutorial : How to invert screen colours at night ? (17th nov. 2017). - Link to NegativeScreen (external link)

Speed conversions


 Airspeed Conversion.pdf

Flight Simulator

Navigation (external link) by François Fouchet, a free software (as in free beer and as in freedom) for real flight planning (VFR). Quite heavy on the processor so you might use our plannig tool YART, Yet Another Route Tool instead.

X-plane utilites (external link) with a nice converter for FS sceneries.

Build a flight plan on maps : (USA), (worldwide)

Pilot documentation by IVAO France.


The french ATC phraseology in 3 pages. The controler guide. French phraseology, controler side only.


Conversion spreadsheet and transition altitude calculation : download and save (ods and xls format)

Aviation Digital Data Service METAR : NOAA server

RocketRoute(c) last Europe weather briefing

Transition level tool
TA QNH Altitude with
ft hPa 5000 ft 50

An aircraft flying at 5000 feet with QNH 1013 hPa flies at 5000 feet with the Baro set to QNH 1013.

Proprietary datasets (and, by the way, payware products !)

Don't like to do free add, however, we hardly can avoid pointing those accurate datasets with real world strict compliance per AIRAC.

Free datasets (Free as in free bier and as in freedom)

X-Plane Robin A. Peel databank used to rely upon publicly-available, freely-available data sources. It is no more the case as X-Plane 11 is sourced from Jepessen. It means also that we can update the simulator data with one of the two payware products, with the advantage of accurate data every 28 days.

However here on this website we keep a databank (modified from Robin A. Peel) under a GNU General Public License that you can download, should you need it : NavData (airports)

By the way, this data used by our flight-planning engine YART ¡ Yet Another Route Tool ! ©.

Updating P3D default navigation data

Presenting FSAeroData Service

Updating P3D default navigation data is now possible since a company has now translated the Jeppesen data from Navigraph into BGL files for FSX and P3D. In this review, we tested a 3 months subscription at FSAeroData for a small fee. (You also need a valid Navigraph subscription, which is checked during the activation process to unlock the download of the BGLs).

The update brings three new directories. Per default, they are stored in your Document directory, which I dislike and I moved them later to my scenery directory. The activation of the new data is a matter of adding those folders into scenery.cfg, on top of your other sceneries.

The original data is kept untouched in Scenery / World / scenery and are just taken over by the new files due to their higher priority.

Here are the results.

In the pictures below, we show the communication frequencies available at LFLC Clermont-Ferrand airport in France before (first picture) and after (second picture) the update with the BGLs from fsAerodata. You can see an increase in available frequencies. A crosscheck with the AIP confirms they are now up to date.

Then below, we show the airpace around LFLC Clermont-Ferrand airport before (first picture) and after (second picture) the update with the BGLs from fsAerodata. You can see an increase in depicted volumes ith accurate (not shown) vertical limits. A crosscheck with the AIP confirms they are now up to date.

In the next panel below, we show the improved airspace around LGSA airport, as well as added IFR procedures for LGIR including the very new RNP APCH for runway 27. We show the default location of the BGLs in the Documents folder as well as a screenshot of the fsAerodata automated tool to download and activate the scenery. But we also show that approaches with RF-legs are not fully supported.

In the end, this is a fresh start for the simulator and for add-ons that use the default FS or P3D navigation databank. For people using liners with their own databank, then it will be usefull to gather the recent Navaids. If you use the default ATC, it will be also usefull rather than cheat the software and ask the ATC for the old approaches when you will be in fact flying the recent approaches from your FMS. I don't think it is usefull to update on a monthly basis however. Getting fresh 2017 data today (and keep it for a few months without updating at each AIRAC) seems fair enough. Since we did learn how to fly in a very outdated simulator since today we might afford that compromise.

Also, flying with up-to-date navigation data is easier in X-Plane with a data subscription, you can in one click update X-Plane database at each cycle. An introduction on RNP approaches

RNAV capability is mandatory in the French airspace upside FL115 with navigation accuracy of 5NM during 95% of the time of flight. This is called B-RNAV capability or RNAV-5. Following a RNAV route in a Terminal area requires equipment to do RNAV-1. RNAV capability is provided with multiple sensors. VOR/DME, IRS and satellites may be used by FMC to compute an integrated localisation in space. But RNAV is not the only performance-based navigation (PBN). RNP are the other category of PBN procedures.

They require even more performance in the navigation and this performance must be monitored for deviation by the aircraft systems. GNSS (global navigation satellite system) is used as primary source of positionning. The position accuracy is also reinforced with other satellites constellations (WAAS, EGNOS). In France, civil aviation autority stated that RNP basic approached are charted as RNAV(GNSS) and RNP AR as RNAV(RNP).

Get our insight here : an introduction to RNP operations.

See promotional vidéo from WestJet about RNP

Guidelines for RNP APCH operations also known as RNAV (GNSS) on french substainable development Office website. Remember that today you will find three different RNP Basic approaches :

Regarder la vidéo de JetBlue sur les approches RNP.JetBlue video on RNP

Bibliography (all links redirect to external websites) :

  1. A37-11 resolution, RÉSOLUTIONS ADOPTÉES PAR L’ASSEMBLÉE, ICAO, pages 23-25, Novembre 2010
  2. Manual on Required Navigation Performance (RNP) (Doc 9613-AN/937), ICAO, 2e édition, 1999, 3ème édition, 2008
  3. Operation Required Navigation Performance (D780-10251-1), The Boeing Company, 21 Octobre 2003
  4. RNP: The World of Required Navigation Performance, Walter Shawlee, avionics news, Janvier 2008
  5. Lecture : l’approche RNAV (GNSS), de la théorie à la pratique, Philippe Bourrel, NHV (Noordzee Helikopters Vlaanderen), AFHSH conference, Mars 2012
  6. Lecture : RNP(AR) Workshop (Required Navigation Performance Authorization Required), Agence européenne de l'aviation civile, 20 Octobre 2012, voir la partie 3 : "Required Navigation Performance Design Equipment Performance and System Capabilities", Kimberly Ten Pas Bell, Honeywell, Octobre 2010.
  7. Lecture : Airbus RNP operations, Michel Brandt, Airbus S.A.S., 4-5 Octobre 2005.
  8. Memento : "From NPA to precision-like approaches", Honeywell, Airbus et Boeing, décembre 2007
  9. Guidelines for RNP APCH operations also known as RNAV (GNSS), Ecology, Substainable Development and Energy Office, Mars 2012
  10. Chapitre 6 sur les procédures RNAV du Mémento IAC à l'usage des utilisateurs des procédures d'approche et de départ (lien externe), Direction des Services de la Navigation Aérienne de la Direction Générale de l’Aviation Civile, 20 Juin 2012
  12. Video, RNP by WestJet, 2004
  13. Video, JetBlue demonstrates RNP approach using flight simulator, 19 Septembre 2012
    More on SBAS (WAAS+EGNOS) :
  1. GNSS Frequently Asked Questions - WAAS (
  2. The Market for Ground-Based and Space-Based Augmentation Systems (ATC global)
  3. WAAS and EGNOS (
  4. European portal for EGNOS (

RNP and home flight simulators

First of all, you have to use a recent navigation database. Before 2010 cycles, no RNP APP were be provided because very little did exist in the real world. iFly 737 (with the update 3.1) was the first add-on to simulate correctly the "radius-to-fix" legs essential to RNP AR approaches. With PMDG NGX you are also able to follow RNP approaches. Older addons for FS9 did lack of navigation accuracy (like in Wilco/Feelthere Airbus). RNP approaches may be usable only if your simulated aircraft has got an accurate LNAV and VNAV simulation.

Back in 2010+, we wrote a synthesis about RNP operation in the flight simulator environnement. Nowadays, the situation is far better than reported in the synthesis. You can seen download the synthesis to get an insight on early RNP operations on domestic simulators.

Synthesis : Transatvia.comRNP in our domestic flight simulations (iFly, PMDG©, Wilco/Feelthere© and QualityWings©)

When you fly on online networks, you need to file flight plans, including registering your performance of navigation. To help you, consider the following level of performance-based navigation certifications to decide for which your simulated ACFT is certified :
PBN/A1 : RNAV 10 (RNP 10)
PBN/B1: RNAV 5 all permitted sensors
PBN/C1: RNAV 2 all permitted sensors
PBN/D1: RNAV 1 all permitted sensors
PBN/O1: Basic RNP 1 all permitted sensors
PBN/O2: Basic RNP 1 GNSS
PBN/T1: RNP AR APCH with RF (special authorization required)
PBN/T2: RNP AR APCH without RF (special authorization required)

"Flight Planning from a PBN perspective", an ICAO document.

SBAS is more for GA, while GBAS, (future CatIII capability) is more for airliners.

"Flight Planning from a PBN perspective", ICAO document with a flight plan example.

General information RNAV and conventional SID/STAR summary for Paris Orly LFPO. Aircraft tips and tools

Please see this page Sceneries

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Disclaimer : this website has NO link with ANY compagny nor organism of the real aviation. Moreover, no information from here can be used in theal aviation, they are provided for flight simulation only and are advisory only. No responsability will be accepted by the page owner for the use of any material linked here.

Back This website has NO link with ANY compagny nor organism of the real aviation. This website is about FLIGHT SIMULATION. No information from here can be used in the real aviation, this is for flight simulation only. is not a virtual airline. Destinations mentionned on this website are only the favorite legs of the page owner. On this page, you will see airplanes painted under colors (or Cimavia colors), but this is a totaly fictionnal airline. INFORMATIONS FOR FLIGHT SIMULATION ONLY.

Some of the names mentionned on this website are trade marks registred in several countries.