AP of B1900c

[Frank Tien 3]

Hi,On B1900c, I'd like to know the difference between "ALT" and "ALT SEL". Thank you for your help.Regards,tcc0928

[aentwis 61]

The same would apply to all aircraft with this autopilot function:ALT is an altitude hold function. That is the altitude you are currently at will be held by the autopilot.ALT SEL is a function allowing you to preselect an altitude, to which the aircraft will climb according to a vertical speed (V/S) or IAS hold function...Hope this helps...Andrew

[vscimone 16]

Yes, Andrew is correct.If you look at the PMDG 1900C main panel, directly to the right of the top COM radio is an altitude set knob. You "select" your alitude here.