Assigned to the Northern Attack Group, "Roe" screened the transports to Mehedia, then provided gunfire support for the troops as they pushed to take Port Lyautey in the Sebou River and the Salé airfield. She arrived off the assault area on the night of 7/8 November, ahead of the main group, and with her SG radar, attempted to locate the beacon submarine, . Unsuccessful, she fixed her own position relative to the jetties and beaches of the landing area, and returned to the main force to help guide it to the transport area. During the early morning landings, she acted as control destroyer off Blue and Yellow beaches, then shifted to gunfire support duties. Shortly after sunrise she assisted in temporarily silencing hostile fire from the Kasba, an old citadel situated on a cliff commanding the mouth of the Sebou.