Let the autopilot steer — understanding marine autopilot systems

May 5, 2019

1 min read

Updated: Oct 11

A marine autopilot controls steering to maintain a selected heading or, when compatible and correctly configured, follow a planned track. It assists the operator and does not take responsibility for navigation.

Marine autopilots combine steering control with sensor information. Choosing the system requires checking the vessel, steering mechanism and intended operation.

The components depend on the installation. Typical arrangements combine a heading sensor, controller, processing unit and a suitable steering drive. Rudder feedback and additional functions depend on the vessel and supported equipment.

Diagram connecting the SmartPilot computer, controller, compass, drive unit and rudder-position sensor.

The controller compares the selected heading or track with sensor information and commands the steering drive. Correct installation and adjustment affect performance. Reduced steering effort or fuel use is conditional, rather than guaranteed. The operator must maintain a lookout and remain ready to take control and avoid hazards.

The examples below are historical product illustrations. Available features, software and compatibility must be checked for the actual installation.

B&G SailSteer

Volvo Penta Glass Cockpit

Furuno Nav Pilot

Simrad AP44

Garmin GHP20

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