I am researching Hellenic Seaways ferries to Hydra, in the Saronic Islands area.
Their website indicates I can sign onto the website and download a digital ticket up to an hour in advance.
But I can also pick up a ticket at a travel center. I do not travel with a lap top.
Does that mean, if I get to the Piraeus Port really early, I can pick up a ticket at the Saronic Lines Ticket Office, near Gate 8 & 9.
The Ticket Office is indicated on the Hellenic Seaways website.
I'm pretty analog! Last time I was on a Greek ferry was in 1971!
Absolutely, you can do it the old-fashioned way, like in the 70s, by buying your ticket at the port ticket office. Lots of people still do it that way. You'll get a paper ticket (for a small additional fee of around €1) with the same QR code as if you had the electronic version.
Below is the Street View of Gate E8 with the ticket offices:
If you are staying in central athens and don't want to get to the port "real early" why not stop the night before at a ticket office by your hotel (they are all over central athens) and get your paper ticket. might cost you an extra €, but one less thing to do in AM.