page_title: USS Von Steuben (SSBN-632)
section_title: Upgraded ballistic missile system
hierarchical_section_title: USS Von Steuben (SSBN-632) / Upgraded ballistic missile system
context_page_description: USS Von Steuben (SSBN-632), a James Madison-class fleet ballistic missile submarine, was the second ship of the United States Navy to be named for Baron Friedrich Wilhelm von Steuben, a Prussian army officer who served in the American Revolutionary War.
context_section_description: In November 1970, Von Steuben visited Groton once again, this time near the end of a 16-month overhaul during which she was modified to carry the newly developed Poseidon C-3 ballistic missile, which boasted major advances in warhead technology and accuracy and systematically was replacing the older Polaris missiles in the Lafayette, James Madison and Benjamin Franklin-class submarines. Von Steuben conducted post-conversion shakedown during the early months of 1971 and, while escorted by the destroyer USS William C. Lawe (DD-763) for range security, conducted a two-missile Demonstration and Shakedown Operation (DASO) in which she fired her first and second Poseidon missiles in February and March 1971, respectively.
  In May 1971, she returned to Charleston and resumed strategic deterrent patrols carrying the newer Poseidon missiles. She conducted an Extended Refit Period at Portsmouth Naval Shipyard between March 1978 and May 1978.
  Von Steuben's ballistic missile system was upgraded a second time in the early 1980s to use Trident I (C4) ballistic missiles. These missiles were also retrofitted to 11 other SSBNs of the James Madison and Benjamin Franklin classes, replacing their Poseidon missiles, and also were the first missiles carried by the early Ohio-class submarines. Trident missiles were three-stage missiles that provided for increased range along with advances in inertial guidance systems. Von Steuben continued making strategic deterrent patrols into the early 1990s with the Trident I missile.
caption: Poseidon missile launch
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