Supply officer (Royal Navy) scheme (entering Britannia Royal Naval College (BRNC), Dartmouth, Devon, as a Cadet or Midshipman, under terms similar to those direct from civilian life) was open to those supply branch ratings under the age of about 25. Such ratings were called CW candidates, and they were specially reported on for selection to attend the Admiralty Interview Board before final selection for promotion and entry to BRNC. The second avenue of promotion from rating to commissioned officer was to the Special Duties (SD) List. Petty officers and chief petty officers could, with the approval of their commanding officer, become a CW candidate
Royal Naval College of Canada Canadian Navy dockyard at Esquimalt. Classes were also held on the Dominion Government Ship "Naden", commissioned as a tender for training in sail. The College was closed in 1922. In the years between 1922 and 1940, Canadian naval cadets went to the Royal Navy's Royal Naval College in Portsmouth. The Royal Naval College of Canada was established to impart a complete education in Naval Science. Candidates were British subjects between 14 and 16 years of age. The terms and curriculum approximated those of Naval Colleges in Britain save for the initial two year rather than three-year program which was followed