Assistant Chief of the Naval Staff (United Kingdom)

The Assistant Chief of the Naval Staff (ACNS) is a senior appointment in the Royal Navy, typically held by a Rear Admiral. The role sits within the Naval Staff, which is the senior leadership team of the Royal Navy, and supports the First Sea Lord and Chief of the Naval Staff in the strategic direction and management of the Navy.

The ACNS is responsible for a broad portfolio of responsibilities that can vary depending on the needs of the Navy. Common areas of responsibility include naval policy, future capabilities, international relations, and strategic planning. They contribute to the development of naval strategy and policy, ensuring that the Royal Navy is prepared to meet current and future challenges.

The specific responsibilities of the ACNS can be further defined by sub-appointments or directorates that report directly to them. This structure allows for a focus on specific areas, such as naval aviation, maritime capability, or personnel matters. The ACNS also plays a vital role in representing the Royal Navy in inter-service and international forums.