As articulated in their respective long-term shipbuilding plans, the Navy and the Coast Guard intend to spend more than $47 billion combined over the next 20 years to purchase a total of 83 small combatants. Of that number, the Navy plans to purchase 53 littoral combat ships (LCSs), in addition to the two that were purchased in 2005 and 2006. The LCSs will be built using two different hull designs-one, a semiplaning monohull; the other, an aluminum trimaran-although the exact mix of hulls has not yet been determined.1 The ships will carry one of three sets of equipment, or mission packages, depending on which mission they are expected to perform (antiship, antisubmarine, or countermine warfare).