Great episode of Nova examining various cruise ship catastrophes, including the recent Concordia wreck.
There’s also a mind-blowing story about the MTS Oceanos, which flooded and sank off South Africa in 1991 due to a valve failure. This musician named Moss Hills and his wife were doing a gig when the shit hit the fan. Power went out, no announcements, no officers to be seen, etc. Moss goes belowdecks with a camcorder and documents a disturbing amount of water sloshing around, then heads to the bridge to inform the captain, but the bridge is empty. He radios an SOS, and the response is, what’s your rank? He’s like, well, I’m a guitarist. South African rescue helicopters show up, and a guy lands on the deck and informs him that, yeah, it’s worse than you think, this thing’s sinking like a rock. Moss gets a crash course in the use of rescue harnesses, and proceeds to organize the evacuation of everyone aboard before him and his wife get hauled off. Zero fatalities (sadly, the captain somehow avoided being shotgunned weeks later in a dark alley).