Originally Posted by
FlightDetent
ICAO 3B: Less than 50' RA or no DH.
Agreed, assuming `fail operational`. EASA visual reference criteria as follows:
CAT IIIB operations conducted either with fail-operational flight control systems or with a fail-operational hybrid landing system using a DH: at DH, at least one centreline light is attained and can be maintained by the pilot.
CAT IIIB operations with no DH: there is no requirement for visual reference with the runway prior to touchdown.
If a DH is required (eg. 20R) then there HAS to be a requirement to achieve a defined visual reference, in order to actually be able to make a decision at all.
If no DH is required, then obviously no visual references need to be defined.
Question for `BalusKaptan`: I fail to understand how you can actually have a `DH of 0 ft`, perhaps I`ve got the wrong end of the stick. You would be on the runway (hopefully!) at this point anyway. What now forms the basis of your `decision`. Would it , for example, be based on a `roll out status` consideration?
EASA `Table 5` minima included just for interest`s sake.
