15 years ago I went on a 3 month Semester at Sea study trip on a small cruise ship circumnavigating the globe.
There was only a handful of whitelisted sites available on the WiFi, otherwise you would need to pay a ton for the satellite connection or … have a staff password.
At least with my group we had a a healthy list of credentials that had been acquired in various ways. Even with occasional password changes, we managed to stay connected.