Plain English Meaning
A label on the autopilot display showing it is keeping the wings level or holding a set bank, rather than tracking a heading or course.
Full Definition
An autopilot mode annunciation indicating the autopilot is controlling the aircraft about its longitudinal axis to hold wings level or maintain a commanded bank angle. ROL is typically the default lateral mode that engages when no other lateral mode (such as heading, navigation, or approach) is selected.
Context Anchor
Seen on a flight display or autopilot status area when the autopilot is on and no - steering mode is selected.