Originally Posted by
vilas
Minimums are not based on FD,s availability. Minima depends on type of approach, precision or non precision. With double RA failure the recommended method is you fly like a LOC approach for interception and gear down then fly Raw data ILS. Then you can use ILS minima. If you use HDG/VS it will become an NPA, a localiser approach with higher minimum.
In Delhi for ILS RWY 29 the RVR required for CAT I is 750 m and the chart also mentions RVR 550 with Flight Director or Autopilot or HUD to DA.