Arriving at Oran toward the end of the month, she continued on to Bizerte, whence she steamed north with the JOSS force for Licata on 8 July. On 9 July, she took up her position in the fire support area off beach Red, near the Torre di Gaffe beach. Early on 10 July, she and moved toward Porto Empedocle, an Italian motor torpedo boat base guarded by a minefield 24 miles west of Licata, to investigate small pips which had registered on their radar screens. As both destroyers prepared to open fire on the "enemy" boats, "Roe" swerved to avoid the minefield and, at the same time, to fall in astern of Swanson. Her speed, however, exceeded "Swanson"s and, just before 0300, "Roe" hit "Swanson" at right angles on the port side shearing off a portion of her own bow and causing "Swanson"s fireroom to flood. Both ships went dead in the water. Fortunately, by 0500, both were mobile.