Transatlantic telegraph cable - Wikipedia
All you need to know about Google's 144 TBPs capacity cable, Equiano
Extremely Low Frequency (ELF) for Submarine Communication – Johnson's Techworld
Fibre Optic Data Cables
SEA-ME-WE 3 - Wikipedia
ELI5: How do underwater cables like the ones across the Atlantic Ocean work? : r/explainlikeimfive
The history of Undersea Transatlantic Cables
Submarine communications cable - Wikipedia
How American Submarines Spied on the Soviet Union for Years
Supergraph: The information network under the sea - Millennium Technology Prize
File:Lebanon submarine telecommunications cables.png - Wikipedia