Who among the following may be delegated by the Commanding Officer for the manned operation of a certified DLSS?

The Diving Officer is typically responsible for overseeing and managing diving operations and ensuring that all safety protocols are followed. Delegating the manned operation of a certified Diver Life Support System (DLSS) to the Diving Officer is aligned with their role, as they possess the requisite training and experience in diving and related systems operation. This individual is well-versed in coordinating dive missions and managing the team's performance in challenging underwater environments, making them the most capable person to take charge of such critical equipment.

The other roles listed, while important in their respective capacities, do not possess the same level of direct experience and responsibility in operating diving systems as the Diving Officer. The Assistant Master Diver may assist in operations but does not typically hold the same authority as the Diving Officer. The Safety Officer's primary focus is on maintaining safety standards rather than the operational aspects of the DLSS. The Chief Engineer is responsible for the technical integrity and maintenance of equipment but does not usually involve themselves in the direct operation of diving systems. Thus, the delegation of responsibility for the operation falls appropriately to the Diving Officer.