OpenCPN is a chart plotter and navigational app whether you're underway or making plans for a trip.Supported Chart Formats:Worldwide standard S57 and encrypted S63 vector chart support.BSB v3 and earlier raster charts.CM93 vector charts with per cell offset corrections.Up-to-date ENCs for selected worldwide regions, distributed by o-charts.orgAIS:AIS input with full target-tracking and collision alerting.AIS support for SART with selectable MMSI for automatic MOB handling.AIS support for DSC and GPSGate buddies.Routes:Route planning with tidal support.Built-in great-circle routing.Integrated weather routing through qtVim or separate plugin.GPS Tracking:Route navigation with ship tracking functions.Waypoint navigation.Autopilot output support.Alarms:Anchor watch/alarm functions.MOB Alarm with tracking.Weather:GRIB and GRIB2 file input and display for weather forecasting.OpenCPN also supports over 30 plug-ins.