There was even some degree of honour amongst the Nachtjager crews. When using Schragemusik (upward firing cannon), it was obviously bad form to fire into the bomb bay from underneath (in case it went bang) so the German night fighters aimed between the inboard and outboard engines to hit the wing fuel tanks which usually caught fire after a few rounds. Nazi doctrine demanded that RAF bombers be attacked on the starboard side - if targeting the starboard side then the fire would trail past the main entry door of a Lancaster thereby preventing the escape of the rear crew. However, many night fighter pilots targeted the port side to give the crew a sporting chance of escape. (It was hard to get out of Lancaster anyway).