Yup. That would be Rik007's SH5 water mod. Nicely done. I use it exclusively. He is up to version .9 now. There's Atlantic (default) Arctic and the Med in the package. I use the 20km version. The Sky reflection influences the water color very realistically and the waves speed has been changed, not to mention wave types. Also...no flat sun.
Right now my U108 Type IXB is just south of Iceland in 15km/s weather. Just being up in the conning surfaced watching 30ft swells around me "almost" makes me want to be seasick...I love this mod.