The next day the 55th Fighter Group flew its first P-38 mission from Britain, a fighter sweep over the Dutch coast. Equipped with 75 gallon drop tanks, the P-38 had an effective escort radius of 520 miles (compared to 375 miles for the P-47). In February 1944 the P-38 units received 108 gallon drop tanks, which increased their effective radius of operations to 585 miles, long enough to reach Berlin. Between October 1943 and March 1944, the P-38 was the longest range fighter available to the 8th Air Force (in March 1944 the P-51D finally received drop tanks that gave it an effective escort range of 650 miles).