 The new tactic outlined in Herrmann's report envisaged the use of free-ranging day fighters (and to a lesser extent night fighters) to counter Bomber Command.The single-engined fighters were to supplement the ground controlled "Himmelbett" (four-poster bed) technique, by co-operation with searchlight crews, mostly over the target.Pyrotechnic and other visual means were to guide the fighters in operations known as "Wilde Sau" (Wild Boar).