 After completing their refits, "T2", "T5", "T8" and "T11" supported German forces invading the Estonian islands (Operation Beowulf) in mid-September and then, reinforced by "T7", they escorted the battleship , as it sortied into the Sea of Åland on 23–29 September to forestall any attempt by the Soviet Red Banner Baltic Fleet to breakout from the Gulf of Finland.