VS mode and airspeed

Select vertical speed

Select VS and a modest vertical rate appropriate to the aircraft and conditions.

Establish a stable climb or descent in a safe, cleared practice area.

Vertical-rate command

Monitor the VS target, actual rate, speed trend and thrust.

FSS describes VS as a commanded vertical rate; maintaining that rate does not by itself guarantee a suitable airspeed.

VS setup

Reduce the demand or select a more suitable mode if speed or thrust becomes inappropriate.