To work out a new MDA/DH with a CR-2 Whiz wheel what heights do you use?
I know for a MAP you must meet the 2.5% climb gradient requirement.
Therefore before flight you work out a one engine inoperative possible gradient.
Say you worked out you could achieve 2% with one engine.
You would then put 25 (2.5%) below 20 (2%) on your whiz wheel (required on bottom).
You then need to find the required height to achieve the MAP, I am wondering how you work this out. Is it merely the Height given to climb in the MAP on the plate from the normal MDA? (so MAP height - normal MDA height) ?
Just was re reading an example out of a text book without a great explanation.