So that’s the previous journey from Katapola to Tinos the day before. That makes more sense, the track in my first post was off from the orientation of the ship in your picture.

Although I realise now that this is probably a picture from your flight in last week. Almost certainly the same ship but a different voyage.

Sea Cloud II passing the island of Rineia on a journey from Tinos to Milos.

Amazing news! Congratulations!