realistic movement mod?

Hi guys,

Im new here but have been playing SH5 for a while.

Ive had a trawl through the site but cant seem to find a specific mod. Im looking for a mod that corrects the boat's movememnt whilst she is on the roof.

I know from first hand experience that boats roll a lot more and definately do not "bob" like a cork in high seas.

I may be wrong, but im pretty certain there is a mod that fixes this... isnt there? Or have I made this up?

many thanks,

M