I am wondering what is the format of theses files: gvw
http://tracking2016.vendeeglobe.org/gv5ip0/resources/weather/20161110-030000.gvw
It is meant to store somehow the weather data but I can't figure out what is the format of this file and how to read it.
It seems related to Garmin but I can't find any specs about that.
Is there anything to convert it to a more comon file format ?