The Offshore Compact weather service is a system, and one of the most important components of that system is the Offshore Data Compact file.

The Offshore Data file is not a GRIB file. LuckGrib is able to import the Offshore files and present them just as if they were GRIB files, but other software will not be able to read them.

When you share an Offshore Data file from LuckGrib to another device or application, it will be converted into an ordinary GRIB file (either GRIB-1 or GRIB-2, depending on what the original file was.)

This gives you the best of both worlds - you have the advantage of obtaining the most highly compressed weather data available, as well as being able to share that data with others, as you choose.