The delivery of maritime capability through autonomous solutions is undergoing exponential development, and increasingly through the deployment of autonomous vehicles. Whilst there is already a range of capabilities with regards to UxV size, range and endurance, the push to develop larger examples is evident. The focus of development has been on mission planning, launch, recovery and execution of tightly bounded missions, typically within line of sight. As the evolution in autonomous vehicles gathers pace, autonomous vehicles will likely increase in size and complexity in order to carry greater payloads, enhance capabilities and enable greater range and operational endurance. This will necessitate a greater focus on platform engineering aspects including monitoring, control, availability management and battle damage assessment such that UxVs can be reliably deployed at range in operational environments. Without a crew on board, the ability to accurately assess platform system health of UxVs, at range, will become more critical to mission success. PMS development into intelligent diagnosis and potentially repair of degrading equipment and systems may be necessary. Historically, crewed vessels have been operated with a clear command hierarchy which defines roles and responsibilities to ensure the success of a mission. Within this hierarchy there is a clear distinction between Combat System and Platform Engineering. Combat Systems’ primary focus is on sensors and effectors, which are inherently dependent on the Platform Systems that deliver power generation, propulsion, and ancillary services such as heat management. As autonomous vehicles develop, demand on these systems will increase still further. Furthermore, with the deployment of increasingly valuable (financial and militarily) vehicles at extended range and durations, the ability to manage platform systems in harmony with sensors and effectors will become increasingly relevant. When operating UxVs, the distinction between platform and combat systems will become fluid, and PMS will need to develop to ensure platform systems can be operated, monitored, diagnosed and supported throughout the mission, at extended range. This paper will consider how PMS must develop to meet the significant challenge of operating platform systems at range, some of the certification and classification challenges, diagnosing and repairing to ensure maximum availability, and a potential operating model where platform services are managed from the operating centre and some scenarios which highlight the value of having such an operating model to ensure the success of the mission.