Founder,
You asked ' "Your way makes more sense and by 1'st segment you're talking about adding the height of 35 ft to the obstacle clearance?
"
The 35 ft is in-built into the system already. The 1st segment is significantly less gradient than the 2nd segment, due to the gear being down or in transit, i.e. the gear retraction phase. 1st segment will invariably "duck under" the Obstacle-clear plane from the runway end to the obstacle, so, what you need to do when considering the 1st segment (which you must) is find the height and distance at the end of the 1st segment, and compare THAT to the remaining distance and height to the obstacle to extract the gradient required.
Thanks OzExpat for clarifying the Metres to Feet conversion to obtain common units. My preference for using division by 0.3048 is that it is an exact conversion, whereas multiplication by the inverse is not, being a surd.
Ahhh John_T, I would have said that the 3rd segment gradient requirement was 0%, but the assumed Net Acceleration Height was DERIVED from the relationship between Net and Gross gradients (Nit picking mode today).
Regards,
Old Smokey