That is very sad! I have a deep fear of the ocean, have nightmares about tsunami's pretty regularly!
I saw on some nat geo or discovery show about an old navy ship that went down in 1945 In Harm's Way: The Sinking of the USS Indianapolis…Amazon.ca: Doug Stanton: Books
anyhow, the poor guys were in the water for 4 days - and the stories about the different delusions and fierce fighting (for flotation or food) was so upsetting. The sharks circling around!
A few of them thought they could "swim down" to find something to help them and a bunch others followed, some started drinking the salt water out of insatiable thirst etc etc. it was sad.