Embraer EMB145 Operation Manual page 2641

7 - VERTICAL SPEED CONTROL KNOB AND IAS/M SELECTOR
BUTTON
Pressing the knob toggles between the speed modes MACH
and IAS.
When in SPD mode, rotation of this knob allows selection of
indicated airspeed in one-knot increments or Mach Number in
0.01 increments.
When in VS mode, rotation of this knob allows selection of
vertical speed in 100 ft/min increments.
8 - YAW DAMPER ENGAGE BUTTON
Pressed once, engages only the Yaw Damper. Pressed again
disengages the yaw damper and the autopilot, if it is engaged.
9 - AUTOPILOT COUPLE BUTTON
Allows the pilot's or copilot's Flight Director commands to
control the autopilot. The couple button can be pressed with the
autopilot engaged or disengaged. However, if the Flight Director
is switched, the modes will drop out and the autopilot will remain
engaged (if already engaged) and revert to basic autopilot
mode (pitch and roll).
10- HEADING SELECT KNOB
Allows selection of heading in 1° increments.
Pressing this knob synchronizes the heading selection to the
current displayed heading.
REVISION 36
AIRPLANE
OPERATIONS
MANUAL
AUTOPILOT
Page
2-19-15 3
Code
01