I am travelling to Serifos from Piraeus on the morning of 3rd September. Speedrunner 4 is fast, but I get slightly claustrophobic on this type of vessel. I would prefer to travel on the Adamantios Korais where I can wander about on deck, even though the journey takes considerably longer. My question is : does this ferry have a reasonably good timekeeping record? (Ignoring very bad weather of course). Can anyone help or point me in the right direction for this type of info.