Share 'Understanding notes and information on Military records 1920-1928'

Hi everyone I am trying to understand some information on a relatives Naval record 1920-1928. He arrived from the RN and then transferred after 2 years to the RAN and then married and stayed in Australia til his death  1951. It would seem the original information on his record was minimal as he was originally on loan from the RN.  I can decipher various additions of notes over the 8 year period b…