Waiver of immunity

damages caused by a public vessel of the United States; or compensation for towage and salvage services, including contract salvage, rendered to a public vessel of the United States. If the United States brings a civil action in admiralty for damages caused by a privately owned vessel, the owner of the vessel, or the successor in interest, may file a counterclaim in personam, or claim a setoff, against the United States for damages arising out of the same subject matter. A civil action in personam in admiralty may be brought, or an impleader filed, against the United States for— (Source: (Pub. L. 109–304, § 6(c), Oct. 6, 2006, 120 Stat. 1521.))