 This system provided the vital advance information that helped the Royal Air Force win the Battle of Britain; without it, significant numbers of fighter aircraft, which Great Britain did not have available, would always need to be in the air to respond quickly.If enemy aircraft detection relied solely on the observations of ground-based individuals, Great Britain may have lost the Battle of Britain.Also vital was the "Dowding system" of reporting and coordination to provide the best use of radar information during the tests of early radar deployment during 1936 and 1937.