The document discusses the Exchange Cruiser Scheme operated by the Royal Australian Navy between 1924 and 1936. Under the scheme, older British cruisers were transferred to Australia in exchange for newer Australian cruisers joining the British fleet. Several Australian cruisers such as HMAS Brisbane, HMAS Adelaide, and HMAS Australia were involved in exchanges for British ships like HMS Hawkins during this period from 1924 to 1936.