 For anti-submarine warfare a variable depth sonar is planned as well as a towed array with its handling system.The Navy originally ordered two "Independence"-class littoral combat ships, the lead ship "Independence" (LCS-2) and "Coronado" (LCS-4), named in March 2009 by then-Secretary of the Navy Donald C. Winter, with odd numbers being used for "Freedom"-class littoral combat ships.On 29 December 2010, the Navy announced that it would be ordering up to ten additional "Independence"-class ships, for a total of 12 ships in the class.