I found this very promising-looking yellow submarine, called Argyronète or Saga, but I can't tell if it's real or just some strange AI fantasy:
https://www.boatnews.com/story/37642/discovering-the-saga-submarine-the-largest-yellow-submarine-in-the-world
I'm having difficulty finding any references to its existence on Wikipedia, despite its apparent connection to Cousteau. Purportedly it was designed to support a crew of 6 for 21 days.
Supposedly it still exists and is maintained by this French org? https://lescompagnonsdusaga.org/
#JacquesCousteau #French