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
Britannia Royal Naval College 1863, when the wooden hulk was moved from Portland and moored in the River Dart to serve as a base. In 1864, after an influx of new recruits, "Britannia" was supplemented by . Prior to this, a Royal Naval Academy (later Royal Naval College) had operated for more than a century from 1733 to 1837 at Portsmouth, a major naval installation. The original "Britannia" was replaced by the in 1869, which was renamed "Britannia." The foundation stone for a new building at the college was laid by King Edward VII in March 1902. Sir Aston Webb designed the shore-based college