. When ready to leave the MDA the pilot uses V/S to start the final descend. Other pilot neither yells nor laughs but just wonders where is this written
Nowhere.
Never heard of V/S mode being endorsed by Boeing for climbs/descent/cruise in turbulence. Sounds like somebody's bright idea.
#W
Neither have I.It is obviously better when entering strong turbulence to reduce the pitch by VS to lets say 500 a min while selecting the appropriate speed than going along for the ride with possibly quite high rate of climb.
"It is not particularly good for a CDA nor a holding pattern descent, just useful."
Why not? Are we talking about a CDA at low levels right?and why not during holding descents?
. Rather than blasting at climb/idle power to level off and then resume the climb/descent many folks prefer the technique of reducing rate of climb/descent to avoid an unnecessary level off. "Technique only"
Technique yes but boeing recommendation too,,less than 2000 ft change of level,VS is the mode...more than that,vnav or LVL change.