Navantia has signed with the US Navy a service contract of four destroyers who will be deployed during 2014 and 2015 in the Naval Base of Rota, as  part of the BMDl, according to the agreement reached between both governments in 2011 and signed in 2012. The contract  includes the maintenance of these units in the periods of immobilization in Rota, and has a duration of 1 years more 6 optional years.