Hi BOAC,
can a D&D now use the new DA
- I don't think so.
I've only seen DA published on NPA charts with published Lateral & Vertical guidance. If there is no Vertical guidance then a MDA is published.
The only reason we are allowed to sink below the DA during the GA, is because we'll be on profile. The D&D aircraft will be further away from the runway when it reaches it's MDA and will be closer to the obstacles which are considered.