M1A1 Abrams tank

HANOVER, Md. (Dec. 12, 2013) An M1A1 Abrams tank drives over an advanced light-weight ramp during an Office of Naval Research demonstration held at Oceaneering in Hanover, Md. The new ramp will be capable of loading and unloading people and combat vehicles between a joint high-speed vessel (JHSV) and multiple platforms in sea state three. (U.S. Navy photo by John F. Williams/Released)