You can read all about it in the book Kill Bin Laden by Delta commander Thomas Greer, a.k.a. Dalton Fury.
Back to Basics: A Rare Instance of US Naval Sobriety
Navigation is fundamental. Every ship in the USN should do this yearly. Advanced, hand-computed celestial navigation is a full-time job. It required both of us to be on (or near) the bridge for approximately 18 hours a day, especially during the morning and evening...