Expedition Navigation Software / Add GFS Primary wave mean period @ surface

**Posted by Herman_NL** 1/20/2025 11:50 pm

Hi Nick,

A suggestion to add a button to download the GFS @ 0.25 degrees weather data for Primary wave mean period @ surface, which is available as per LuckGrib.

If this feature is added, both ECMWF WAM and GFS WW3 have this wave mean period data. An additional feature could then be to incorporate the primary wave mean period into the Wave table. So you can route for instance with various mean periods, eg the 3 buckets 0 to 5 seconds; 5 to 10 seconds; > 10 seconds. And adjust polars / routing.

Hope this idea makes some sense,

Herman

**Posted by Nick** 1/20/2025 11:58 pm

Hello,

Thanks.

By coincidence, GFS wave period has been added for the next update. You can get it by clicking the Update button on the Exp grib server window.

Technically the GFS wave model isn't WW3 I think.

**Posted by Herman_NL** 1/22/2025 7:08 am

Super, looking forward to the next release.