Flight Information Publications (FLIPs) - En-Route

En-Route Series VI Charts
ERCs provide graphical detail of airway routes, designated airspace, airspace reservations, radio navigation facilities and en-route communication. They contain minimal topographic information but importantly Maximum Elevation Figures are shown. An En Route Chart Legend is available in the Mil APD Vol 1 and as a separate document.
The ERC series provides a consistent and near-global series of approximately 65 charts. The charts depict upper, lower or combined airspace sub-designated 'High', 'Low' and 'High/Low', (H), (L) and (H/L), respectively. Where no upper airspace limit is defined by nations, FL245 is used. When produced for a specific operation or exercise, the chart is further designated 'Special' (Sp). The following types of ERCs are published:
  • Low Altitude: Aeronautical Information is shown only for the lower airspace. Where no UIR is defined the upper limit of aeronautical information shown on chart will be FL245.

  • High Altitude: Aeronautical Information is shown only for the upper airspace. Where no UIR is defined the lower limit of the aeronautical information shown on chart will be FL245.

  • High/Low Altitude: These charts show aeronautical information for both upper and lower airspace.
The most common projection for ERCs is the Oblique Mercator and the most common scales are 1:2 000 000 and 1:1 000 000. All ERCs include a WGS84 based latitude and longitude graticule with a grid overlay on a small number of charts.
ERCs are re-issued on an as required basis in line with the 28-day AIRAC cycle. Therefore, some ERCs (typically those in Europe) may be updated on average every 2nd cycle whilst others may not be updated for a whole year (13 cycles) or more. Typically, 10 to 15 ERCs will be re-issued on any particular AIRAC cycle. ERCs are available in paper format and also in digital format (ASRP). A sub-set of the charts are available in proprietary digital format for aircraft navigation and mission planning systems

Series VI Chart Example


This is a Specimen Chart only - not for use in the air

En-Route Supplements (ERS)
ERSs provide a comprehensive listing of aeronautical information (including airfield and navigation aid) for specific regions. The ERSs include information on all active UK military airfields and selected foreign civilian and military airfields with hard surface runways of minimum length of 1500m/5000ft that also provide communication facilities. Other airfields can be included on request.

The ERSs are available in paper and digital format. ERSs can be downloaded as Adobe .pdf files from the No 1 AIDU web-site on supported networks.
ERSs are published for the following areas:

  • BINA - British Isles and North Atlantic

  • NOREU - Northern Europe

  • EUMED - European Mediterranean

  • SAAAFE - Southern Atlantic, Africa, Asia and Far east

Flight Information Handbook (FIH)
The FIH is a digest of information from various larger document sources that is required for in-flight reference. It contains emergency and safety procedures, en-route information and holding procedures as well as codes and conversion tables. The FIH is available in paper and digital format. ERSs can be downloaded as an Adobe .pdf file from the No 1 AIDU web-site.