((a)) ** .—** In a case in which, if a vessel were privately owned or operated, or if cargo were privately owned or possessed, or if a private person or property were involved, a civil action in admiralty could be maintained, a civil action in admiralty in personam may be brought against the United States or a federally-owned corporation. In a civil action in admiralty brought by the United States or a federally-owned corporation, an admiralty claim in personam may be filed or a setoff claimed against the United States or corporation.
((b)) ** .—** A claim against the United States or a federally-owned corporation under this section shall be tried without a jury.