TitanicdirectorJames Cameronis getting to the bottom of how the RMS Titanic actually sank.

“The filmTitanicdepicts what we believed was an accurate portrayal of the ship’s last hours.

We were sort of half right in the movie.”

LOS ANGELES - DECEMBER 19: The movie “Titanic”, written and directed by James Cameron. Seen here, the sinking of the Titanic. Initial USA theatrical wide release December 19, 1997. Screen capture. Paramount Pictures. (Photo by CBS via Getty Images)

James Cameron says he got the sinking of the Titanic in his film ‘half right.'.CBS via Getty

Titanic: 25 Years Later With James Cameronairs Sunday at 9 p.m.

ET on National Geographic and streams the next day on Hulu.

The White Star Line passenger liner R.M.S. Titanic embarking on its ill-fated maiden voyage.

The R.M.S. Titanic.Bettmann Archive