 The torpedoing of the dreadnought battleship on 21 December by the Austro-Hungarian submarine showed that the battleships were vulnerable to this threat, and they were withdrawn to spend the rest of the month further south at an anchorage in Navarino Bay.On 11 January 1915, the French were alerted that the Austro-Hungarian fleet was going to sortie from its base at Pola, so the Naval Army sailed north to the Albanian coast.It proved to be a false alarm, and they were back at their moorings three days later.