Engaging the Autopilot
When you engage the autopilot, the autopilot takes control of the helm and steers the boat to maintain your heading.
From the heading screen in standby mode, select
Engage.
Heading Hold and 
at the top of the heading screen appear in green when the autopilot is engaged. Your actual and intended heading information shows in the center of the heading screen.
NOTE:
When installed on a sailboat, you can engage either the standard heading hold or engage a wind hold when a compatible wind sensor is connected to the same
NMEA 2000® network (Wind Hold).