What must the tanker do with receiver aircraft once rendezvous is complete and until further ATC clearances are received?

Once the rendezvous between the tanker and the receiver aircraft is complete, the correct action is to maintain them in either standard or nonstandard formation. This is necessary to facilitate continued communication and control during the refueling operation, ensuring safety and efficiency.

Maintaining formation allows for synchronized movements, enabling the receiver aircraft to prepare for and execute the refueling procedure effectively. The tanker must remain in a position where it can guide the receiver aircraft appropriately and ensure there is a clear line of sight and proper spacing for the operation. Flexibility in using either standard or nonstandard formation gives the tanker crew the ability to adjust based on the specific circumstances of the operation, such as weather conditions or the dynamics of the aircraft involved.

This choice aligns with the protocols for aerial refueling operations, which prioritize controlled and coordinated maneuvers to prevent mishaps during this critical phase.