Wave polars?

Hi! We are working on an article about connectivity in the Baltic Sea region during the Viking Age, and we are using qtVlm for sailing simulations. Wind polars have been published for Viking Age ship reconstructions; however, we would also like to test the effect of waves but have not been able to find suitable data for a qtVlm-style wave polar.

Has anyone created a wave polar for a modern vessel, preferably one based on measurements? If so, would you be willing to assist us with our research? Anything that could serve even as a very rough approximation of a Viking ship would be extremely helpful. In this case, we have the 14 meter long Skuldelev 3 in mind:

www.vikingeskibsmuseet.dk/en/visit-the-m...ng-ships/skuldelev-3

Kind regards,Postdoctoral researcherUniversity of Helsinki

Hi,

There are several waves polars that come with the software, you can use them as exemple (cruising, dinghy, sailboat, trawler and even tanker). The interesting part is also to add wave steepness in the equation, this is described in the documentation.

Ah, brilliant! We’re running a somewhat older version to keep all the simulations consistent, and it only included example.polwave.csv, but I found the others in the latest version.

Could you also briefly explain what the numbers in sailboat.polwave.csv are based on? Your help is much appreciated!

Wesa

This is pure AI estimation for a typical 12m monohull sailing boat.