Access the links below to take virtual tours of some historic vessels from the National Defense Reserve Fleet (NDRF) and Ready Reserve Force (RRF), and learn more about the history of the United States merchant marine.

• USNS Comet
  Comet is considered to be the first purpose-built ocean-going Roll-on/Roll-off vessel.  This panoramic virtual tour takes you inside of both the cargo and crew spaces on the former “Mother of All Ro-Ros”
• SS Petersburg
  Originally built in 1963, Petersburg was one in a fleet of five tankers fitted with an offshore petroleum discharge system. An Offshore Petroleum Distribution System (OPDS) provides a semipermanent, all-weather facility for bulk transfer of petroleum, oils, and lubricants (POL) directly from an offshore tanker to a beach termination unit (BTU) located immediately inland from the high-water mark.
• GTS Admiral William M. Callaghan
  Still an active part of the Ready Reserve Force, GTS Admiral William M. Callaghan is an early Roll-on/Roll-off vessel, and is the first gas turbine-driven vessel built by the U.S. Navy.  This panoramic virtual tour takes you inside of the vessel’s engine room, including a detailed look at the port side engine, General Electric LM2500 serial number 456-001.