The new nautical charts Garmin Bluechart g3 provide all the information you need to see on your portable Plotter screen: complete navigation chart with depths, reefs, nautical points, obstacles, wrecks, restricted areas, etc., fishing chart with depth contours. The quality of the data is guaranteed by the leading company in the field, NAVIONICS. The Bluechart G3 charts are ideal for the eTrex, eTrex Touch, Dakota, Oregon, GPSMAP 64/66/78/86 series as well as for all fixed Echomap plotters.