Υ1 – Στη σιωπή του βυθού
- Tahun: 2020
- Negara: Greece
- Genre: Documentary, History
- Studio: EPT, 2|35, FAOS
- Kata kunci: sea, navy, submarine, world war ii, greece, exploration, sunken submarine, british navy, ship wreck, german occupation of greece, katsonis, greek navy
- Pengarah: Filippos Vardakas
- Pelakon: Bilio Tsoucala