Marine Map Settings
You can customize how the map appears in marine mode.
Hold MENU, and select Map > Marine.
Spot Soundings: Enables depth measurements on the chart.
Light Sectors: Shows and configures the appearance of light sectors on the chart.
Symbol Set: Sets the chart symbols in marine mode. The NOAA option displays the National Oceanic and Atmospheric Administration chart symbols. The International option displays the International Association of Lighthouse Authorities chart symbols.