Christopher Vourlias When two-time Olympic sailing champion Sofia Bekatorou revealed in 2020 that she had been raped by a senior member of the Greek sailing federation while competing for the national team, she inspired dozens of other women to break their silence, sparking the country’s #MeToo movement. In her feature-length directorial debut, “Tack,” which premiered this week at the Thessaloniki Documentary Festival, Greek-British filmmaker Vania Turner follows one such story: the shocking case of a younger sailor, Amalia Provelengiou, who alleged she’d been repeatedly abused and raped by her coach — beginning when she was only 12 years old.