Define " Dowding system " ?
This comprised an integrated air defence system which included (i) radar ( whose potential Dowding was among the first to appreciate ) , ( ii ) human observers ( including the Royal Observer Corps ) , who filled crucial gaps in what radar was capable of detecting at the time ( the early radar systems , for example , did not provide good information on the altitude of incoming German aircraft ) , ( iii ) raid plotting , and ( iv ) radio control of aircraft .