https://www.bbc.com/news/world-europe-guernsey-30795559
Ggf. käm bei 40 kn auch im Wasserschutzpolizeiboot Freude auf
According to Seajets' website the intention is that Champion Jets 1 and 2 will sail between Piraeus, Mykonos, Naxos and Santorini.
Most of these routes are seasonal, operating between April and October every year.