Ohio class submarines carry 24 Trident missiles.

The Ohio Class ballistic missile submarine at 560 feet in length.

Beluga class submarine was created in 1988.

Until 1959, the Triton, one of the first-generation Nuclear subs was the longest, and the first US submarine to have two independent reactors. She measured 447 ft 6 in (136.40 m) overall.

Then, the longest current class of submarine, the Ohio-class, at 560 ft (170 m), was built, and is now the longest submarine in the US Navy.

The Kursk was an Oscar II class submarine, of the Russian Navy.