The book is mistaken about POTESTAS; it was her sistership PROBITAS that was sunk by the Luftwaffe during the attempt to rescue soldiers from Sarande, POTESTAS had been captured in Vlore on 9 September and remained in German control.

DUBAC (with 100/200 men killed onboard) was run aground near Otranto and sank after a few days; after the war she was reclaimed by Yugoslavia, refloated in 1946 and towed to Fiume (by then Rijeka) to be repaired, but was not given priority as she was an old ship and the shipyards there were already busy repairing other, more valuable vessels. She was laid up near Krk, her name being meanwhile changed to ŠOLTA, but sank again in December 1946. In early 1947 the Yugoslav government transferred the wreck to Jugoslavenska Linijska Plovidba, but she remained submerged for another eight years; in 1954 a decision was finally made to scrap her. She was then salvaged and scrapped by Brodospas between late 1954 and 1955. This was the reason I was wondering what happened to DIOCLEZIANO after being run aground in September 1943.