A crewmember rest support system (10) includes a berth mattress (32). A support structure (34) is coupled to and supports the berth mattress (32). A pneumatic system (36) is coupled to the support structure (34). The pneumatic system (36) includes an inflatable member (100) that has one or more inflatable states. A pump (102) actuates the inflatable member (100) and articulates a portion of the support structure (34).