The USS Pennsylvania has been in commission since 9/9/1989, seems old but it still has some of the newest tech when it comes to submarines. The Ohio Class Sub is one of 18 other Ohio Class subs in its family.
It displaces nearly 16.5k tons when its surfaced and almost 19k when submerges. It's right at 560 feet long and can still travel at about 29mph (25 knots) thanks to its PWR nuclear reactor, 2x geared turbines and 1x325 hp auxillary motor. 1 shaft at 60,000 shaft horsepower! Jesus!
It can safely dive to 800 feet (240m) while it's 150 occupants sleep safely in their bunks. Granted, that's the test depth.... Seriously doubt they are rolling that deep all the time.
