The Naval Institute is home to a special library, housing multiple resources in the areas of interest for naval enthusiasts, naval historians, authors, and students.
The Lost 52 Project is a long-term exploration and underwater archeological project that is documenting and preserving the story of the Lost 52 WWII Submarines, executing and managing expeditions with the goal to discover and survey as many of the lost 52 US WWII submarines as possible.
The study of military history has evolved into a multidisciplinary effort to go beyond the history of military operations to consider broader political, cultural, and social questions .Oxford Bibliographies in Military History will offer a trustworthy pathway through the thicket of information overload (Oxford Univ. Press).
ShipIndex.org tells you which books, magazines, and online resources mention the vessels you're researching. With 153,649 entries in the free database and 3,389,829 entries available with premium access, you're bound to find useful information here.