ENR 5.4 — Air Navigation Obstacles — En-Route
NIL
No en-route air navigation obstacles exceeding the criteria specified in ICAO Annex 15 are currently published for the Damascus FIR area outside the aerodrome obstacle limitation surfaces.
Obstacle data within aerodrome areas is published in the relevant AD 2 sections. Temporary obstacles are promulgated by NOTAM.
Reference: ICAO Annex 15, Chapter 10 — Terrain and Obstacle Data.
Obstacle Reporting and Marking
| Category | Requirement | Reference |
|---|---|---|
| Obstacle Survey | Obstacles ≥100m AGL reported to GACA | ICAO Annex 14, Ch. 6 |
| Obstacle Lighting | Red steady/flashing lights for structures ≥150m AGL | ICAO Annex 14, 6.3 |
| Day Marking | Orange/white bands or red/white for structures ≥45m AGL near aerodromes | ICAO Annex 14, 6.2 |
| Reporting Obligation | Construction of high structures must be notified to GACA 90 days prior | Syrian Air Law |
Significant obstacles in the vicinity of aerodromes are listed in the respective AD 2 sections. En-route obstacles exceeding 100m AGL are published by NOTAM when newly erected or modified.