Add new table games are not yet scheduled. Moreover, the platform Board games at the moment supports only games with complete information. Sea battle is not one of them.
https://ru.wikipedia.org/wiki/%D0%98%D0%B3%D1%80%D0%B0_%D1%81_%D0%BF%D0%BE%D0%BB%D0%BD%D0%BE%D0%B9_%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%86%D0%B8%D0%B5%D0%B9