Originally Posted by rhovsquared
None: the fcom gives this as the following guidance under "automatic flight procedures "The Autopilot is certified to be engaged above 500ft. When the initial climb is established, ensure the aircraft is established on the desired speed and select an autopilot to command (CMD). This causes the autopilot to engage in the Vertical Speed (VS) and Heading Hold (HDG HOLD) modes.
If the vertical speed at the time of engagement has not been established and is momentarily high, it may be necessary to select a lower, more suitable figure in the VS window in order to prevent a loss in airspeed" i hope that clarifies my reason for posting.
Are you flying a desktop PC?
It would be a rare event to see any pilot engage the autopilot at that low of an altitude. While the aircraft is
certified to allow engagement at low altitude, it is not flown this way on the line.