Arki Island, Greece.
From April–Oct, F/B Nisos Kalymnos, stops at Arkí en route between Lipsi (via Patmos) to Pythagoreion on Samos (via Agathonisi)—up and down in the same day— four days per week (generally Mon, Wed, Fri, and Sun). Maráthi has no scheduled service, but can be reached most easily by day-excursion boats which leave from Lipsi or Patmos during the summer season.