Book by Dr. Robert D. Ballard : "Bob" is the man who found the Titanic.
The video covers four of the disasters but other ships are included in the book.
I found the full video on YouTube recently and watched it. From 2000, I'm sure there is better technology to locate sunken ship exploration today, but it's still worth watching. There's historical footage - film and photos - as well as testimonials of witnesses and the descendants of passengers.
Because of the infamy of the Titanic disaster, most people don't know there were many other steamships that sunk.
The Lusitania was sunk by a torpedo aimed at it by a German U Boat, another explosion followed which might have been ammunition for the war : the official word was that the war supplies it carried were not ammunition or explosives but the 2nd explosion is not understood to this day. It was in sight of land yet all happened too suddenly for efficient rescue.
When the Empress of Ireland, a Canadian disaster, sunk, more people lost their lives than had due to the Titanic. This ship had crossed the ocean many times. Passengers were assured there was. it all took 14 minutes and many quickly died drowned in the dark in their bunks. Only 357 survived.
So many people who wanted to start over their life who instead ended their lives. Ships become graves and are corpses themselves.