On 18 June 2025, the Piraeus Single-Member Court of First Instance declared the latest strike by the Greek seafarers’ union PΕΝΕΝ illegal. The industrial action targeted ATTICA GROUP’s Adriatic services under the Superfast brand and follows two previous strikes that were also ruled unlawful, along with a separate strike by the Patras Labour Centre.

ATTICA GROUP, which employs Greek crews, stated it is suffering significant damage due to what it described as PΕΝΕΝ’s “systematic illegal behaviour.” The company announced it will seek civil and criminal liability against the union, its leadership, and members. Efforts are being made to assist hundreds of affected passengers.