Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest information on the Coronavirus Disease 2019 (COVID-19) is available on For USDOT-specific COVID-19 resources, please visit our page.

United States Department of Transportation United States Department of Transportation


Online Exhibits

Virtual Tours

  • USNS Comet
    Comet is considered to be the first purpose-built oceangoing 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.
Last updated: Monday, October 12, 2020