High Quality Content by WIKIPEDIA articles! Fritz X was the most common name for a German guided anti-ship glide bomb used during World War II. Fritz X was a nickname used both by Allied and Luftwaffe personnel. Alternate names include Ruhrstahl SD 1400 X, Kramer X-1, PC 1400X or FX 1400 (the latter is also the origin for the name "Fritz X"). Along with the USAAF`s similar Azon weapon of the same period in World War II, it is one of the precursors of today`s anti-ship missiles and precision-guided weapons.