I appreciate that I have arrived somewhat late on this particular topic. However, I seem to have a variety of Warrant Officers in my family tree. The earliest being a surgeon and a purser during the Napoleonic Wars. A son of the latter was an Inspector General of Hospitals and Fleets in the 1880s. More recently, my grandfather seems to have followed WO route; 1930 ? Electrical Artificer, RN Barracks, Chatham 1937 ? Acting Warrant Electrician, HMS VERNON 1939 ? Warrant Electrician, HMS CORNWALL & HMS CALEDON 1944 - Commissioned Electrician, HMS VERNON 1944-1946 - Commissioned Electrician & Electrical Lieutenant, HMS HOWE. 1947 ? Lieutenant (L), HMS MARLBOROUGH 1948 ? Lieutenant Commander & Flotilla Electrical Officer, HMS CHEQUERS. 1955 ? Commander, Air Electrical Officer, HMS NUTHATCH 1956 ? Commander, Staff Electrical officer, Flag Officer Ground Training 1957 ? Commander, Deputy Command Electrical Officer, Flag Officer Air (Home) I presume the three main ?steps? were from Artificer to Warrant Electrician and then Commissioned Electrician?