This feature is a tool for situational awareness only and may not prevent groundings or collisions in all circumstances. It is your obligation to ensure safe operation of your vessel.


The Beeper setting must be turned on to make alarms audible (Sounds and Display Settings). Failure to set audible alarms could lead to injury or property damage.

Boundaries allow you to avoid or remain in designated areas in a body of water. You can set an alarm to alert you when you enter or exit a boundary.

You can create boundary areas, lines, and circles using the map. You can also convert saved tracks and routes into boundary lines. You can create a boundary area using waypoints by creating a route from the waypoints, and converting the route into a boundary line.

You can select a boundary to act as the active boundary. You can add the active boundary data to the data fields on the chart.

GUID-25CCEC48-337E-47C0-8B89-5C35CCDB65AC v27
March 2024