<Li> Proximity fuze for shells, bombs and rockets . This fuze is designed to detonate an explosive automatically when close enough to the target to destroy it, so a direct hit is not required and time / place of closest approach does not need to be estimated . Magnetic torpedoes and mines also had a sort of proximity fuse . </Li> <Li> Guided weapons (by radio or trailing wires): glide bombs, crawling bombs and rockets - the precursors of today's precision - guided munitions existed between 1942--45, in the German Fritz X and Henschel Hs 293 anti-ship ordnance designs, which along with the American Azon, were all MCLOS radio - guided ordnance designs in World War II service . </Li> <Li> Self - guiding weapons: torpedoes (sound - seeking, compass - guided and looping), V1 missile (compass - and timer - guided), and the U.S. Navy's Bat air - launched anti-ship glide ordnance, using active radar homing for the first time anywhere . </Li> <Li> Aiming devices for bombs, torpedoes, artillery and machine guns, using special purpose mechanical and electronic analog and (perhaps) digital "computers". The mechanical analog Norden bomb sight is a well - known example . </Li>

How did changes in technology make wwii different than wwi