Japan Stunned By America's Fletcher Class Radar And Their Night Fighting Edge Vanished Discover how ⚓ Japan’s long-held mastery of night warfare vanished in just 18 months when U.S. Navy Fletcher-class destroyers brought radar to the Pacific. From 1942 to 1943, these American warships—equipped with groundbreaking SG radar developed by MIT—transformed naval combat by detecting enemy vessels over 15 miles away in total darkness. During the ferocious night battles of Guadalcanal, Vella Gulf, and Ca