Υ1 – Στη σιωπή του βυθού
- Annu: 2020
- Paese: Greece
- Genre: Documentary, History
- Studio: ERT, 2|35, FAOS
- Parolla chjave: sea, navy, submarine, world war ii, greece, exploration, sunken submarine, british navy, ship wreck, german occupation of greece, katsonis, greek navy
- Direttore: Filippos Vardakas
- Cast: Bilio Tsoucala
