and Writer Messengers were abolished, with Harbourmen being transferred to corresponding Seaman or Stoker grades. Coaling Masters were renamed Coaling Supervisors. Engineers 3rd Class were renamed Mechanicians. Boatswains were introduced as third-in-command of larger tugs, second-in-command of vessels with no Mates, or in charge of certain smaller vessels. All Masters, Mates, Engineers and Coaling Supervisors C1 became salaried and were officially classed as officers. From 1947, the non-salaried grades were as follows: Boy Ordinary Seaman/Stoker 2nd Class Able Seaman/Stoker 1st Class/Dredger Deckhand/Dredger Fireman Dredger Deckhand (Winch Driver) Dredger Ladderman Leading Stoker/Coaling Supervisor Class 2/Wireless Telegraph Operator Leading Seaman Dredger Crane Driver/Dredger Grab Driver Boatswain/Chief Stoker/Qualified Wireless Telegraph Operator Mechanician/Coaling Supervisor Class 1 These grades were still extant in 1962. 1970 By 1970 the grades were: Seaman Apprentice Ordinary Seaman/Mechanic 2nd Class Able Seaman/Mechanic 1st Class Able Seaman Special Leading Seaman/Leading Stoker/Fuelling Supervisor 2nd Class Chief Stoker/Fuelling Supervisor 1st Class Boatswain/Mechanician Footnotes References Statement of the Decisions of the Lords Commissioners of the Admiralty on the Petitions received from the Civilian Employees in HM Dockyards and Naval Establishments at Home in 1914 Admiralty, Conditions of Service, Rates of Pay, Allowances etc. of the Ratings Serving in the Yard Craft at HM Dockyards, Victualling Yards etc. at Home, December 1926 Admiralty Fleet Order (AFO) 2/62, 5 January 1962 Royal Navy