Garmin BlueChart for your Garmin plotter / GPS. BlueChart g2 from Garmin is a series of nautical chart, in vector format, for Garmin chartplotters and Garmin handhelds. The charts include on-chart position in relation to navaids, spot soundings, coastal features, anchorages, port plans, waterways, obstructions, restricted areas and more. Coverage is available worldwide in regional offerings. Find a complete and updated list of Garmin products compatible with BlueChart g2.