You will get a grib file with an email exchange:
- press the
button - press the REQUEST GRIB button
- select a source: SailDocs or SailGrib
- select a model, usually the GFS
- if you picked SailGrib as a source, set the request mode to Email
- at the bottom of the screen, check the box “Make the grib request with Iridium Mail” and enter your iridium email address
- press the LAUNCH GRIB REQUEST button. An e-mail is prepared and sent to the “Iridium Mail & Web” app
In the Iridium Mail & Web app:
- send the email with the iridium network
- wait for 5 minutes
- press the send/receive button again. You should have received an email from SailDocs or SailGrib with a grib file attached
- save the grib file
In SailGrib:
- press the
button
- press the OPEN GRIB button
- choose the grib in the list, the last one saved is at the top of the list
The maximum reasonable maximum size of an grib received by iridium is about 70 kb, adjust your settings accordingly. For example, to get the whole Atlantic, set the grid resolution to 2.5°.
But most of all, practice on the ground before you set sails. First in 3G or WiFi to make sure you set the settings correctly to get a grib file size of 70kb or less. Then, with the iridium Go to get a file in near-real conditions. It is preferable to use an external antenna with the iridium Go. If you haven’t put the Go outside, it will work better.