Originally Posted by
wiggy
It would be interesting to see if you hit the green step point as the step distance reduces to zero........
Doesn't the FMC change from whatever milage it shows to S/C change to "Step to FL: NOW" once you cross the "S/C" dot on the ND?
That being said, we always use RCMD.
The only time we go by OPT is when engine out is activated during drift-down to consider the FL to descend to, but there it only shows MAX and OPT anyway.