Breaking | US Navy Attack Submarine USS Columbia SSN 771 Arrives at Portsmouth to Extend Its Service Life

USS Columbia (SSN 771), a Los Angeles-class nuclear-powered attack submarine, arrived at Portsmouth Naval Shipyard in Kittery, Maine, on October 29 for a Service Life Extension Program overhaul. The maintenance effort follows similar work on USS Cheyenne and USS Hampton as the Navy seeks to retain late-build submarines beyond their original retirement plans. Portsmouth will perform the availability, but the Navy has not specified its duration, price or whether Columbia will receive a replacement reactor core. The arrival marks the start of the overhaul process rather than completion of the life extension or return to operational service.