 Following the capture of Belgrade on 11 October and the initial clearance of mines and other obstacles , the flotilla sailed downstream to Orșova near the Hungarian – Romanian border and waited for the lower Danube to be swept for mines . Commencing on 30 October 1915 , they escorted a series of munitions convoys down the Danube to Lom where the munitions were transferred to the Bulgarian railway system for shipment to the Ottoman Empire . 
