The choice between the Dreyer and Pollen systems was controversial at the time. The Royal Navy had repeatedly tested Pollen's designs and had given him what it considered very preferential terms for them. Pollen in 1925 won an award for £30,000 from the Royal Commission on Awards to Inventors for elements of his "Argo Clock" that had been used without his permission. At the same time Dreyer applied for a similar grant but due to the fact that in 1915 he had been awarded £5,000 for his services to fire control his request was denied.