User blog comment:HistoricalGamer/7 Key Subs In History/@comment-10905876-20160214061230

So, seven significant subs eh?

Alright, let's see here:


 * The Colonial Navy's Turtle, for being the first combat sub to make a combat sortie, even if no ships were sunk.


 * The Confederate Navy's H.L. Hunley for being the first sub to sink a ship in combat.


 * The Royal Navy's K-class submarines, notable for being valiant attempts at a high speed sub, and spectacularly prone to failure.


 * The Kreigsmarine's Type XXI class for their advanced hydrodynamics.


 * The United States Navy's USS Albacore for pioneering the teardrop hull form used on later nuclear submarines.


 * The United States Navy's Nautilus for being the first nuclear sub.


 * The civilian Alvin, for her numerous contributions to underwater exploration.

While fictional, Jules Vern's Nautilus deserves special note. She inspired countless engineers and visionaries to push the limits of submarine design.