The Navy did fly some B-17's towards the end of the war. But the B-24 was used in greater numbers because of its greater range. Bombers were used to anti-submarine, anti-surface warfare for good success.Pudge said:My grandfather was also an aviator in the Navy - delivered numerous B-17s from here to across the pond into England during WW II. I know someone will try to correct me because the B17 was mostly used by the USAAC but he was in the Navy, I'm certain of it!