Don't you understand? The water is freezing and there aren't enough boats. Not enough by half.
8 seconds sound clip from the Titanic (1997) movie soundboard.
You can hear this line at 01:56:30 in the Blu-ray version of the movie.
Quote context
[...]
- Come on, sister, you heard the man. Into the boat.
- Any room for a gentleman, gentlemen?
- Only women at this time, sir.
- Will the lifeboats be seated according to class?
- I hope they're not too crowded.
- Don't you understand? The water is freezing and there aren't enough boats. Not enough by half.
- Half the people on this ship are going to die.
- Come on, Ruth, get in the boat. First class seats are right up here.
- You know, it's a pity I didn't keep that drawing. It'll be worth a lot more by morning.
[...]