Crab - not sure why you are lecturing me again, on something I know.
I think you miss the point.
The choice of Vtoss is an attempt at Vx but taking other factors into account.
Best angle (Vx) is what you need for avoiding obstacles ahead, Vtoss is the proceedure's 'attempt' at that. As SC says using Vtoss instead of Vx gives alot of performance away (in exchange for other benefits, repeatability, control etc), and the suggestion is that this invention might help get closer to Vx. (but it would need ground speed too, GPS (with 'augmentation') could do this).
Hence Vx, Vtoss or Vtosh?
HNYr