Well, if it's a Cat 3b ILS, the RVR minimum is down to 75 meters. However a category 3 approach is linked to company specific minimas , like aircraft type, aircrew etc. The company minimas are documented, but not on the government charts

I will say it again. DH is linked to aircraft autopilot limitations and, as said, company SOP and aircrew qualifications. Nevertheless, DH cannot be lower than 50 feet if you don't have a fail operational autopilot. That's why you don't see it on the chart.

 

Isn't it also linked to the regulations under which the flight is performed? For example, EU-OPS specifies that the lowest minima to be used by an operator for a III B Approach is 125 meters with a Fail-passive roll-out control/guidance system and 75 meters with a Fail-operative roll-out control/guidance system.

 

 

Isn't it also linked to the regulations under which the flight is performed?

 

But of course. It is impossible for an airline to be certified to operate on lower minimums than those set by the authorities.

 

The SOP and airline / aircraft / crew certification is based on regulations such as EU-OPS.

 

And you are correct about the RVR values on Cat IIIb.