Originally Posted by
underfire
How would you know that looking at an approach plate? So you think that an operator is going to do an obstacle assessment?
Operators are already doing obstacle assessments as part of their take-off performance. Presumably the operator or a contractor would do the work required to check whether they can use the MDA as a DA or not and then publish that information to the pilots in their manuals. If it was me it would be an all or nothing thing. If the homework shows that all company destinations and alternates can use MDA as a DA then allow it, otherwise disallow it for everywhere.