Underfire widely misses the mark
@underfire. You are incorrect, and are at least decades behind both global criteria evolution for VNAV, as well as being inconsistent with many air carrier operator policies for using VNAV globally, who by the way entirely safely use a DA in place of an MDA on a wide variety of "Non-ILS (non xLS) approaches types. This entire subject was beaten to death decades ago in the FAA/JAA/Industry AWO HWG, ...and those discussions even led to substantially revised criteria. Only flawed provisions in some authorities outdated criteria (who perhaps do not understand either FOSA or risk analysis) still (unnecessarily) force an additive of 50 ft when using a DA in lieu of an MDA. As to "beech35"'s concern, this entire subject has nothing to do with what a commercial chart manufacturer may or may not analyze, or publish. Typically commercial chart providers publish whatever the state specifies, or that which the operator asks them to publish, as based on an approved Op-Spec or equivalent.