Mr. Gilbert is the author of The Last Saturday of October: The Declassified Secrets of Black Saturday (Bibliopole, 2018). A graduate of the U.S. Naval Academy, he served on board the patrol gunboat USS Douglas (PG-100) and the fleet ballistic-missile submarine Will Rogers (SSBN-659). A pioneer in modern submarine detection, tracking, and localization, he holds four patents, has published technical papers in multiple professional journals, and has lectured in the United States and Europe.