The Association of Passenger Ship Operators called on the Hellenic Seamen's Federation (PNO) on Wednesday to suspend their two 48-hour rolling strikes, saying they are creating serious problems in the transport of passengers and freight to and from the islands. 

All passenger ferries will remain docked across Greece on Friday, May 1, as the Pan-Hellenic Seamen’s Federation (PNO) will go on a 24-hour strike to mark May Day.