Returning to Oran, "Andromeda" spent the next few weeks at several locations on the North African coast preparing for another amphibious assault. On 5 September, the attack cargo ship stood out of Mers el Kebir with Task Group (TG) 81.2, the transport group of the Southern Attack Force for the invasion of the Italian mainland just to the southeast of Naples on the shores of the Gulf of Salerno. She arrived at her destination late in the evening of the 8th. Early the next morning, troops of the Army's 36th Division stormed ashore at Salerno. "Andromeda" remained in the transport area in the gulf until the 10th discharging troops and equipment to fuel the offensive. She departed the area during the last watch of the 10th with a convoy bound for Oran, Algeria. The attack cargo ship anchored in Oran on the morning of the 14th. On the 19th, she headed back to Salerno carrying supplies and reinforcements. "Andromeda" unloaded at Salerno on the 22nd and the 23rd and then embarked upon the return voyage to Algeria.