What is the designation for a fleet replenishment oiler?

The designation for a fleet replenishment oiler is indeed T-AO. This classification identifies ships that are specifically designed to transfer fuel and other supplies to naval vessels at sea, which is crucial for sustaining naval operations over extended periods. These vessels play a vital role in maintaining the operational readiness and mobility of the fleet by enabling them to refuel without returning to port.

In the context of naval logistics, T-AOs are equipped to provide fuel, which is essential for the running of ships, and possibly other supplies, ensuring that naval forces can operate efficiently in various theaters of operation. The distinction of T-AO allows for organized logistics within the Navy, where each ship type has a specific role to play.

The other designations represent different classes of ships: T-AE refers to ammunition ships, T-AKE designates dry cargo and ammunition ships, and T-AV typically refers to aircraft conduct support ships. Each of these ship classes has distinct missions and operational roles that do not include the primary function of fuel replenishment that T-AO encompasses.