SSN Los Angeles Class Nuclear Submarine - Naval Technology
The United States Navy has 51 nuclear powered Los Angeles Class submarines, 16 in the Pacific Fleet and 32 in…
www.naval-technology.comHere are the latest widely reported developments on Los Angeles-class submarines:
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The U.S. Navy completed the refueling overhaul and major life-extension work on USS Cheyenne (SSN-773), making it the first Los Angeles-class boat to finish a Service Life Extension Program (SLEP) overhaul. The upgrade includes renewed nuclear propulsion core, modernized combat systems, and aims to extend the submarine’s operational life beyond 44 years. This marks a significant push to sustain the class as the fleet ages.[1]
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In a separate development, reports indicate the Navy has inactivated USS Boise (SSN-764) after a long sustainment period, transferring work toward newer priorities, which reflects a broader shift in fleet management and resource allocation for older submarines in the Los Angeles class. This deactivation highlights the challenges of maintaining a large, aging fleet and the need to balance modernization with readiness.[2][3]
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General background: the Los Angeles-class comprises nuclear-powered fast-attack submarines designed for multi-mission roles, including anti-submarine warfare, intelligence gathering, and land-attack capabilities, with typical crew sizes around 100–130 and a propulsion plant based on a nuclear reactor. Ongoing maintenance and occasional overhauls have been a constant feature as the fleet ages.[4][5]
Illustration: USS Cheyenne’s SLEP overhaul represents one key path to sustain the class, while Boise’s inactivation illustrates the attrition and prioritization dynamics facing the submarine fleet today.[1][2]
If you’d like, I can pull more detailed Navy statements or recent press coverage, or summarize how SLEP upgrades specifically affect propulsion, sensors, and survivability for Los Angeles-class boats.