Υ1 – Στη σιωπή του βυθού
- Blwyddyn: 2020
- Gwlad: Greece
- Genre: Documentary, History
- Stiwdio: EPT, 2|35, FAOS
- Allweddair: sea, navy, submarine, world war ii, greece, exploration, sunken submarine, british navy, ship wreck, german occupation of greece, katsonis, greek navy
- Cyfarwyddwr: Filippos Vardakas
- Cast: Bilio Tsoucala
