 He tried moving the horizontal antennas to the outside of the nacelles , but this had little effect . Another attempt using vertically oriented antennas " completely cured the problem " , and allowed the antennas to be positioned anywhere along the wing . When he later tried to understand why the antennas had always been horizontal , he found this had come from the ASV trials where it was found this reduced reflections from the waves . Given the parallel development of the ASV and AI systems , this arrangement had been copied to the AI side without anyone considering other solutions . 
