the Naval Staff * Assistant Chief of the Naval Staff * Assistant Chief of the Naval Staff (Air) Assistant Chief of the Naval Staff (Foreign) Assistant Chief of the Naval Staff (Home) Assistant Chief of the Naval Staff (Operations) Assistant Chief of the Naval Staff (Policy) Assistant Chief of Naval Staff (Submarines) Assistant Chief of the Naval Staff Assistant Chief of the Naval Staff (Warfare) Assistant Chief of the Naval Staff (U boat and Trade) Assistant Chief of the Naval Staff (Weapons) Structure of the naval staff May 1917 The Naval Staff was organised by Admiral of the Fleet Sir John Jellicoe as follows: First Sea Lord and Chief of Naval Staff Deputy Chief of the Naval Staff Intelligence Division Mobilisation Division Operations Division Signal Division Assistant Chief of the Naval Staff Anti-Submarine Division Convoy Section Minesweeping Division Trade Division June 1917 The Naval Staff was organised as follows: First Sea Lord and Chief of Naval Staff Deputy Chief of the Naval Staff Intelligence Division Mobilisation Division Operations Division Signal Division Assistant Chief of the Naval Staff Anti-Submarine Division Minesweeping Division Trade Division December 1917 The Naval Staff was organised as follows: First Sea Lord and Chief of Naval Staff Deputy Chief of the Naval Staff Operations Division Plans Division Signal Division Assistant Chief of the Naval Staff Anti-Submarine Division Mercantile Movements Division Minesweeping Division Mobilisation Division Trade Division Deputy First Sea Lord Training Division 1918 to 1919 The Naval Staff was re-organised under Admiral of the Fleet Sir Rosslyn Wemyss as follows: First Sea Lord and Chief of Naval Staff Intelligence Division Gunnery and Torpedo Division Training and Staff Duties Division Deputy Chief of the Naval Staff (Home Waters Operations) Air Division Operations Division (Home) Plans Division Signal Division Assistant Chief of the Naval Staff (Trade Protection Operations) Anti-Submarine Division Mercantile Movements Division Minesweeping Division Trade Division Deputy First Sea Lord (Policy and Overseas Operations) Operations Division (Foreign) 1920 The Naval Staff was re-organised under Admiral of the Fleet Sir David Beatty, as follows: First Sea Lord and Chief of Naval Staff Intelligence Division Gunnery and Torpedo Division Training and Staff Duties Division Deputy Chief of the Naval Staff (Home Waters) Air Division Operations Division (Home) Plans Division Local Defence Division Assistant Chief of the Naval Staff (Trade Protection) Anti-Submarine Division Mercantile Movements Division Minesweeping Division Trade Division Deputy First Sea Lord (Policy and Overseas) Operations Division (Foreign) 1921