To save fuel, animals, such as oxen were used to carry fighters from dispersal to the take off point. Pilots were ordered to shut down the engine immediately on landing. The "Oberkommando der Luftwaffe" (OKL – German Air Force High Command) managed to scrape fuel together while the battles lasted, allowing some units to fly five sorties per day. The "Schlacht" Fw 190s were hard hit. Among those operating the Fw 190 were SG 10, which lost 59 Fw 190s in July 1944. The fighter units fared better. IV./JG 54 claimed 80 aerial kills for 31 losses, 21 to enemy action. However, it seems from loss records that even experienced German units had lost more aircraft than they actually shot down in this period. The "jabos" maintained intense activity and succeeded in inflicting heavy damage to Soviet forces. On 11 July 1944 200 Soviet vehicles were claimed by Fw 190 units. In Estonia, SG 3 and 4 claimed 400 Soviet vehicles destroyed on 28 July. The German air units helped slow down the advance into the Baltic states. In Poland the Lvov–Sandomierz Offensive had captured bridgeheads over the Vistula river. The German air units tried to eliminate the foothold. On 28 August the Fw 190s of the "Schlachtgeschwader" along with Ju 87s claimed to have sunk 28 bridging ferries. The assaults failed to prevent the Soviets from continuing westward. Still, the Fw 190s SG 2 and 77 took advantage of brief moments of air superiority to inflict heavy losses of Soviet infantry, as at times the Red Army's advance was so fast that they outran their air support, allowing the Germans a free hand. In East Prussia the "Luftwaffe" sent an 800-strong force under "4. Fliegerdivision". JG 54, operating the Fw 190 fighter versions along with SG 4 supported the German Fourth Army and enabled them to halt the Soviet attempt to crush the Courland pocket. On one day, 27 October, the Fw 190 fighter unit JG 54 claimed 57 aircraft shot down. SG 4 lost 17 Fw 190F ground attack machines. On 28 October, Erich Rudorffer claimed 11 victories, reaching a total of 209. Fw 190s of JG 54 claimed 600 victories between 14 September and 24 November, while the Soviet units reported a total loss of 779 aircraft.