SSN is the US Navy hull classification symbol for such vessels; the SS (as 'Ship Submersible') denotes a submarine [1] and the N denotes nuclear power. The designation SSN is used for interoperability throughout NATO under STANAG 1166, [2] though navies use other terms.

USS Jimmy Carter (SSN-23) is the third and final Seawolf-class nuclear-powered fast-attack submarine in the United States Navy. Commissioned in 2005, she is named for the 39th president of the United States, Jimmy Carter, the only president to have qualified on submarines. [7]

The SSN(X) or Next-Generation Attack Submarine program of the United States Navy aims to develop a new class of nuclear-powered attack submarines to succeed the Virginia and Seawolf classes. The SSN(X) program remains in the early stages of development and no official details have been released about its design or capabilities.

Feb 27, 2025 · Attack submarines are designed to seek and destroy enemy submarines and surface ships; project power ashore with Tomahawk cruise missiles and Special Operation Forces (SOF); carry out...

Apr 1, 2024 · In the first of a kind, the U.S. Navy has fitted a new form of propulsion, magnetohydrodynamic drive (MHD), to a Virginia class submarine. This promises to make the submarine virtually undetectable, the holy grail of naval warfare.

Feb 8, 2025 · Key Points and Summary: The U.S. Navy faces a major decision: move forward with the advanced SSN (X) attack submarine or continue upgrading the Virginia-class. With SSN (X) expected to cost over $5.5 billion per hull—compared to $3.2 billion for Virginia-class subs—budget concerns may force the Navy to delay SSN (X) until the 2040s.

Dec 12, 2024 · Navy Next-Generation Attack Submarine (SSN[X]) Program: Background and Issues for Congress Introduction The Navy has been procuring Virginia-class nuclear powered attack submarines (SSNs) since FY1998. The Navy’s envisaged successor to the Virginia-class design is the Next-Generation Attack Submarine, or SSN(X). The

Feb 25, 2025 · USS Minnesota (SSN 783) arrived in Western Australia on February 25, 2025, kicking off the first of two planned U.S. fast-attack submarine visits to HMAS Stirling in 2025. Port visits support the

May 27, 2021 · The Navy wants to start purchasing a new class of attack submarine, SSN (X), starting in 2031. SSN (X), or Next-Generation Attack Submarine, will focus on the traditional submarine mission...

Feb 11, 2025 · From the service’s SSN (X) submarine to its F/A-XX fighter and DDG (X) destroyer proposals, the timely arrival of any new platform will no longer be possible. Currently, the Navy’s Next-Generation...