The Mobile Landing Platform (MLP) is a type of amphibious assault ship being constructed for the United States Navy, with the first ship due to enter service in 2013. MLP ships are to serve as floating bases for amphibious operations, and operate as a transfer point between large ships and small landing craft. Proof-of-concept testing began in 2005, with heavy lift ships serving as substitutes for the MLPs. General Dynamics' National Steel and Shipbuilding Company was awarded a contract to design and build the first ship in late 2010, with construction beginning in July 2011. The United States Navy initially plans to acquire three vessels (with a possible fourth proposed in 2012), which will be designated the Montford Point class.