Disengaging the Autopilot
When you disengage the autopilot, the autopilot stops controlling the helm and you must steer the boat to maintain your heading.
From the heading screen, while in heading hold, select
Standby.
Standby and 
at the top of the heading screen appear in gray when the autopilot is in standby mode.
The autopilot does not steer the boat while it is in standby mode. You are responsible for controlling the helm when the autopilot is in standby mode.