Procurement of KONGSBERG: RUDDER AND STERN FRAME EXAMINATION in support of the USNS MEDGAR EVERS AKE 13) . Kongsberg (Formerly Rolls-Royce) is the OEM of the Bow Thruster Propeller Unit, Tunnel, Steer... Procurement of KONGSBERG: RUDDER AND STERN FRAME EXAMINATION in support of the USNS MEDGAR EVERS AKE 13) . Kongsberg (Formerly Rolls-Royce) is the OEM of the Bow Thruster Propeller Unit, Tunnel, Steering Gear and Rudder Gland Seal.