Military Sealift Command (MSC) is closely connected to the Navy, sharing many similarities, yet they remain distinct organizations with unique rules, regulations, and cultures. This overlap can create challenges, especially for those transitioning from different backgrounds. Former Navy sailors might findMSC’s less stringent personal regulations, pay and smaller crews a surprising change. On the other hand, those coming from commercial shipping may need time to adjust to MSC’s long deployments and frequent interactions with the Navy.MSC and its Civilian Mariners (CIVMARs) support a range of Navy missions, including overseas logistics, underway replenishments, and the operation of special mission and hospital ships. While they work side by side, they have an array of fundamental differences.