1. 
   Knickebein
   Crooked Leg - German navigational system using radio beams to guide bombers
   Found op http://www.secondworldwar.co.uk/glossk.html
   
   
2. 
   Knickebein
   (from the article `air warfare`) ...hitting targets. With visual navigation impossible except on the clearest moonlit nights, electronic aids became vital. In the blitz of London and ...
   Found op http://www.britannica.com/eb/a-z/k/40
   
   
3. 
   Knickebein
   crooked leg, also "bent leg" (in the sense of "dogleg"); German navigational system using radio beams to guide bombers.
   Found op http://en.wikipedia.org/wiki/Glossary_of_German_military_terms
   
   

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