Nothing big in submarine-istan today. Soooo, here is a useful Infographic Show video with many submarine engineering, historical and health realities. Don't be deceived by the kiddie-cartoon style.
Perhaps start 1 minute 20 seconds in on spherical submersible vs tubular submarine strengths. Naval submarines must be tubular to house crew, electronics, weapons, to move quickly and hydro-dynamically, etc.
2:05 A submarine must protect its crew by maintaining liveable air pressure. High pressure oxygen
and nitrogen dangers. [Meanwhile too little Oxygen can cause headaches, eventually death. Too
much Oxygen - greater danger from static-sparks causing fire/explosion.]
and nitrogen dangers. [Meanwhile too little Oxygen can cause headaches, eventually death. Too
much Oxygen - greater danger from static-sparks causing fire/explosion.]
3:03 Subs very limited in diving ranges. "Design""Test" and "Crush" depths.
3:55 Soviet, now Russian Akula class SSN in the 1980s. [Preceding Titanium Alfa class submarine
even deeper diving.]
even deeper diving.]
5:22 DSV Alvin submersible secretly [found and raised a thermonuclear weapon (true) and] located
the wreck of the USS Scorpion (SSN-589) with Scorpion still armed with nuclear torpedoes.
the wreck of the USS Scorpion (SSN-589) with Scorpion still armed with nuclear torpedoes.