INS Flavus is a former United Empire of Earth (UEE) Navy installation in the Tiber system.
Flavus was originally established as one of two fleet support bases in the system with a focus on supply chain management. It acted as a military depot and a contact point for civilian freighters moving goods and personnel to Tiber. During the Siege of Tiber, the installation was designated as the secondary command and control point following the destruction of INS Aniene. Surviving elements of the 81st Battle Group massed at Flavus in anticipation of a push to retake the Tiber, but when they received orders to retreat from the system instead the installation was abandoned.