Why are Submarines Black and Cruise Ships White?

If you have previously heard of explanations on why submarines are black, well, you need to watch this video. It's not what you think!

Footage courtesy of U.S. Navy used under the Creative Commons Attribution license. Thank you for that!

Note: "The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement."

REFERENCES:
https://www.navysbir.com/n16_1/N161-0...
http://www.navsource.org/archives/08/...
http://makeyourdepth.blogspot.com/200...
https://www.todayifoundout.com/index....
https://en.wikipedia.org/wiki/HMS_Van...
https://en.wikipedia.org/wiki/HMS_Tor...)
https://www.ripublication.com/ijaersp...
https://core.ac.uk/download/pdf/77039...
https://web.archive.org/web/200609121...
https://www.nature.com/articles/212284a0
https://www.researchgate.net/publicat...
https://link.springer.com/article/10....