The simple fact is that GS can be used in every phase of flight to back up pretty accurately PITCH POWER/WEIGHT /ALTITUDE TABLES provided by OEM.
It is possible to fly completely safely an entire flight just by reference to ground speed using two things
WIND
TAS INCREASE WITH ALTITUDE = 50kts/1000 ft
thats it.
And if you are caught in a sudden chaotic UAS + SHAKER + MULTIPLE WARNING just maintain current GS PITCH AND POWER.
if anyone thinks this doesn’t work get yourself on a sim. Right away. It does.
Safe flying
Y