submarine cables

A Smarter Every Day episode from aboard a nuclear submarine on how the crew makes breathable air. It covers oxygen generation from seawater, oxygen candles and CO2 scrubbing with amine.

Destin Sandlin of Smarter Every Day documents boarding a US Navy nuclear submarine in the Arctic during the ICEX 2020 under-ice exercise. It is the first of a series on life aboard a fast attack submarine.

Destin Sandlin of Smarter Every Day explains how a US Navy nuclear submarine surfaces through Arctic ice, filmed during the ICEx exercise. It shows ballast and control systems and the physics involved.

A documentary on how Cornwall became a hub for the world's communications, from the first transatlantic radio signal to modern undersea fibre cables. It describes how cable landing stations and the systems are put together.

Linus Tech Tips tests a large batch of DisplayPort cables with a Total Phase cable tester, checking bandwidth and signal quality. Many cables did not meet their claimed specs.

A short clip about the Australian Collins class submarine HMAS Rankin reportedly defeating US Navy ships in a war-game exercise.

Linus Tech Tips tests whether chaining many PCIe riser extensions causes loss of GPU performance. They keep adding extensions to see how far the signal will go.

A short sketch from the Australian satirical series Utopia in which Jim and Rhonda seek Tony's help ahead of a major defence white paper, lampooning submarine and defence procurement policy.

A Just Have a Think video on the proposed 16 billion pound Xlinks project to build solar, wind and battery capacity in southern Morocco. It would send around 3.6GW to the UK by subsea HVDC cable as near-baseload power.

Rick Hartley's AltiumLive keynote on differential pairs in PC boards. He argues the rules from cables and twisted pairs do not carry over, and covers which pair geometry gives the best impedance control, the right spacing, routing practice and how much skew is acceptable.

Adam Savage and engineer Zach Radding examine Lumafield CT scans of Apple's $130 Thunderbolt 4 cable alongside cheaper USB-C cables. They explain the internal components that distinguish Thunderbolt from ordinary USB-C.

Tech Ingredients explains the principles of magnetohydrodynamics and builds several demonstrations, including propelling liquid metal and electrolytes with magnets and a railgun-style setup.

A 1984 AT&T film showing the live cutover of a Glendale, California central office from step-by-step switching to an electronic switching system. Installers prepare the site and then cut cables in a coordinated operation.

Physicist Jean-Pierre Petit gives a long technical commentary on Russia's newly announced weapons, including the Sarmat missile, a nuclear-powered cruise missile and a nuclear MHD-propelled submarine drone.

Retired submarine captain David Marquet explains, with drawings, how he turned the USS Santa Fe around by treating his crew as leaders rather than followers. It summarizes the ideas of his book Turn the Ship Around.