A recording of Charles Lightoller, second officer of the Titanic, describing his experiences during and after the sinking. There are a (very) few key people on the Titanic whose actions saved hundreds of lives, and he was one of them.
https://www.youtube.com/watch?v=WT8W1E3ctvs
Also, I highly recommend reading his life story. It is amazing, deserving of a biography IMHO. Among other things, he took his personal boat to Dunkirk in 1940, at age 66, to rescue British soldiers. This is portrayed in the "Dunkirk" movie although the character is given a different name.