[Igo kyu]

The Luffberry Circle:

http://en.wikipedia.org/wiki/Lufbery_circle

Also used by allied fighters in North Africa, and successfully attacked by Marsaille.

http://en.wikipedia.org/wiki/Hans-Joachim_Marseille

To counter German fighter attacks, the Allied pilots flew "Lufbery circles" (in which each aircraft's tail was covered by the friendly aircraft behind). The tactic was effective and dangerous as a pilot attacking this formation could find himself constantly in the sights of enemy pilots. Marseille often dived at high speed into the middle of these enemy defensive formations from either above or below, executing a tight turn and firing a two-second deflection shot to destroy an enemy aircraft.