H/S/C Cat I is the new state-of-the-art high-speed ferry of Magic Sea Ferries that connects Lavrio with Kea, Kythnos, Serifos & Sifnos offering fast, comfortable and affordable transportation to its passengers. CAT I has a carrying capacity of 766 passengers in airline type seats and has 4 seat classes (Super economy, Economy, Prime economy, Business) and 125 cars or alternatively 100 cars and 6 buses. The official operational speed is 30kn. The H/S/C Cat I route upgrades the services offered in marine transport, transporting passengers daily from Lavrio to Kea, Kythnos, Serifos e Sifnos.