Compare to commercial software such as Expedition or Deckman. Designed for use onboard with limited internet connectivity. Support for Sail Online virtual racers. Bluewater Racing uses high-quality, free, publicly available data from NOAA and various universities for its charting and weather routing.It reads Grib weather files which are available from sources such as Saildocs, and NOAA BSB charts that are available from many sources.  The basic planning chart is built from the University of Hawaii’s high-resolution shoreline database, which can be zoomed down to microdegrees of latitude and longitude.