After having early-on proved the inadequacy of the turret fire-power in fending off attacking fighters during daylight attacks, the Wellington went on to build up a great reputation for reliability and ruggedness in night bombing operations. In April 1941, they were the first to drop the deadly "block-buster" bomb, during a raid on Emden, and they helped to initiate the Pathfinder target-indicating tactics. In service, the Wellington was known as "The Wimpy", after J. Wellington Wimpy, Popeye's friend