9.G, I would have thought that PANS OPS 4 and Part 25 certification are two completely different animals...
DraggingAir...... it really depends on how the AFM was constructed, the person that you really need to answer the question for the DHC8 is Mad (Flt) Scientist. Generally speaking, most of our (non Bombardier) AFM's go to a maximum distance of 12 nms, if you have obstacles further than that, you have to scale them back within the chart. You should be able to use the charts to determine the distance where you will complete the acceleration portion.
Mutt