ENR 6 — En-Route Charts
En-Route Charts for the Damascus FIR are published in accordance with ICAO Annex 4 (Aeronautical Charts) and contain the following information:
ENR 6.1 — En-Route Chart — Lower Airspace
The lower airspace en-route chart depicts ATS routes from ground level to FL 245 within the Damascus FIR. Chart contents include:
- Lower ATS routes (A, B, G, R, W series) with magnetic tracks and distances
- Significant points and waypoints with coordinates
- Radio navigation aids (VOR, VOR/DME, DME, NDB) with identification and frequencies
- FIR boundaries and boundary crossing points
- Minimum en-route altitudes (MEA) and minimum obstacle clearance altitudes (MOCA)
- Aerodrome locations — OSDI, OSAP, OSLK, OSDZ, OSGN
- Prohibited, restricted and danger areas with designators and vertical limits
ENR 6.2 — En-Route Chart — Upper Airspace
The upper airspace en-route chart depicts ATS routes from FL 245 to FL 460 within the Damascus FIR (OSTT UIR). Chart contents include:
- Upper ATS routes (UA, UB, UG, UM, UR, UW series) with magnetic tracks and distances
- Significant points and waypoints used in the upper airspace structure
- UIR boundary and adjacent FIR/UIR boundaries
- Radio navigation aids relevant to upper airspace operations
- Conditional routes and route segments with availability conditions
ENR 6.3 — En-Route Chart Index
The chart index provides an overview of chart coverage areas and sheet numbering for the Damascus FIR region.
Chart Specifications
| Specification | Value |
|---|---|
| Chart Projection | Lambert Conformal Conic |
| Scale | 1:2,000,000 (approximate) |
| Datum | WGS-84 |
| Units of Measurement | Nautical miles / Feet |
| AIRAC Cycle | Per ICAO AIRAC system (28-day cycle) |
Note: En-route charts are updated in accordance with the ICAO AIRAC cycle. Pilots and operators should ensure they hold the current edition. Chart amendments are promulgated via AIP Amendments and NOTAMs as required.