Your operator should also provide you with a table for
Failed or Downgraded Equipment – Effect on Landing Minima
- FULL refers to FALS
- Limited refers to IALS
- No Approach Lights refers to NALS
Definitions of Approach Light Systems
- FALS (Full Approach Light System) ICAO: Precision approach CAT I Lighting System (HIALS >720 m) distance coded centreline, Barrette centreline.
- IALS (Intermediate Approach Light System) ICAO: Simple approach lighting system (HIALS 420-719 m) single source, Barrette.
- BALS (Basic Approach Light System) Any other approach lighting system (HIALS, MIALS or ALS 210-419 m).
- NALS (No Approach Light System) Any other approach lighting system (HIALS, MIALS or ALS < 210 m) or no approach lights.
An RVR of less than 750 m may be used For Category 1 approach operations to runways with FALS (Full Approach Lighting System) (see below), Runway Touchdown Zone Lights (RTZL) and Runway Centreline Lights (RCLL) provided that the DH is not more than 200 ft.
Cat 1 with a DA between 200-210 ft, requires an RVR of:
- 550m FALS*
- 750m IALS
- 1000m BALS
- 1200m NALS
List continues for higher DA's...
Downgraded equipment (abbreviated):
- Approach lights except the last 420 m, nil effect on CAT 3 & 2, Cat 1 & NPA require IALS minimums
- Approach lights except the last 210 m, nil effect on Cat 3, Cat 2 not allowed, Cat 1 and NPA require use of NALS minima
- Approach lights, Cat 3 with DA>50ft not allowed, Cat 2 not allowed, Cat 1 & NPA require NALS minima