Which afloat supply division is identified as S-4?

S-4 is the designation for the Ship Services division within afloat supply operations. This division is responsible for providing various services to the crew and managing amenities that contribute to the overall morale and welfare onboard a ship. The functions of S-4 can include managing the ship's retail activities, providing laundry services, and overseeing the operation of shipboard vending machines, among other services that directly enhance the living conditions for personnel.

The designation of S-4 specifically identifies this division, distinguishing it from other supply divisions such as Hotel Services, Stock Control, and Disbursing Services, which each have their unique responsibilities and functions within the larger supply chain and organizational structure of the Navy. Understanding the roles of different supply divisions is crucial for effective logistics support and operational efficiency in naval operations.