Back around Easter 1999 there was a German offshore station called Offshore 98 which rented a suitable ship and set sail into International waters off the coast of Germany and broadcast for one weekend only.

https://offshoreradio.info/das-interview/

English Translation
https://offshoreradio-info.translate.goog/das-interview/?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp

I found some recordings

https://www.mixcloud.com/OffshoreRadioReplay/playlists/offshore-98/