The museum has many different parts. The museum has a lot of displays and unique mementoes of US submarines in WWII and later. The Bowfin is a beautifully restored WWII submarine with a famous legacy. In addition, there are outside displays including a sub conning tower, 40 mm antiaircraft gun, torpedoes, missiles, and a Japanese mini-sub. There's also a small snack stand and eating area, and a gift shop. If you're going to Pearl Harbor, you have to see this, the USS Missouri, the Pacific Aviation Museum, and the Arizona Memorial. Plan on spending most of the day here!