Here’s the story of the rescue if anyone’s interested:
http://www.uscg.mil/history/articles/pendleton_webster.asp
I’m planning to see it and understand films taking historical license with true stories for the sake of film making but I am interested in the historical accuracy in the film. It looks like the film increases the involvement of Mrs. Weber (she was home sick according to the book and they were already married, not engaged as the previews suggest) during the rescue.