My wife just finished a novel that links Orange Beach AL and U-166, sunk off New Orleans on this date in 1942:
http://andspeakingofwhich.blogspot.com/2012/03/u-166-and-robert-e-lee.html

Novel is titled, "The Heart Mender" by Andy Andrews.
http://www.andyandrews.com/blog/heres-somthing-you-wont-believe/

Submarine remains located in 2001 by BP crews working near the wreck of the Robert E Lee.