Submarining is, and always has been, a very dangerous profession. Not only are there other militaries out there looking for submarines, often with hostile intent, but a million things can go wrong at any time. Sometimes, we know exactly what sank a boat. Sometimes, they just never came back.
My original intention was to compile a list of Submarines that are on “Eternal Patrol”. The more I researched the issue, the more I became aware of others that have already done this. The following is a link to an excellent Memorial Site that was originally posted on SubNet:
Lost Boat Memorial
Charles R. Hinman, Director of Education & Outreach for the USS Bowfin Submarine Museum & Park in Honolulu has put together an outstanding site dedicated to to all men lost while serving in the U.S. Submarine Force: