Subsequently, the Finnish forces reduced the salients of Beloostrov and Kirjasalo, which had threatened their positions at the sea coast and south of the River Vuoksi. Lieutenant General Paavo Talvela and Colonel Järvinen, the commander of the Finnish Coastal Brigade responsible for Ladoga, proposed to the German headquarters the blocking of Soviet convoys on Lake Ladoga. The idea was proposed to the Germans on their own behalf going past both Finnish Navy HQ and General HQ. Germans responded positively to the proposition and informed the slightly surprised Finns—who apart from Talvela and Järvinen had very little knowledge of the proposition—that transport of the equipment for the Ladoga operation was already arranged. The German command formed the 'international' naval detachment (which also included the Italian "XII Squadriglia MAS") under Finnish command and the "Einsatzstab Fähre Ost" under German command. These naval units operated against the supply route in the summer and autumn of 1942, the only period the units were able to operate as freezing waters then forced the lightly equipped units to be moved away, and changes in front lines made it impractical to reestablish these units later in the war.