An incomprehensible malfunction occurred recently for a Weather4D user, sailing in a “lost hole” on the edge of the Indian Ocean, namely the Cocos Islands, challenged me to the point of getting lost in conjectures. A GFS file due ten days ago categorically refused to be displayed in the application with the date, damn !
This unfortunate sailor - for which I would like to thank him - forced me to make a determined search for the cause of the problem.. After much procrastination, explorations of settings that may be faulty, since no other user had reported such a problem to us, the light finally came out ! Read more …


As part of the gradual conversion of raster charts to vector charts ENC (
Latest releases Lite, Routing, Routing & Navigation arrive with a full renewed list of weather and ocean models in order to allow users to benefit from the evolution of the offer of international forecasting models. At the same time, all GRIB files go to format GRIB-2, this allows for a reduction in their size and a better compression ratio.
Since the arrival of ARM-based Mac (M1… M3…) and the system macOS 11 Big Sur, Weather4D Routage & Navigation works natively on our favorite computers (
Yachtmen my friends, Many of you still encounter difficulties with the subtleties of the routing function in Weather4D, despite the pages dedicated to routing errors in both user manuals (