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Admiral of the Fleet Sir Henry Bradwardine Jackson, (21 January 1855 – 14 December 1929) was a Royal Navy officer. After serving in the Anglo-Zulu War he established an early reputation as a pioneer of ship-to-ship wireless technology. Later he became the first person to achieve ship-to-ship wireless communications and demonstrated continuous communication with another vessel up to three miles away. He went on to be Third Sea Lord and Controller of the Navy, then Director of the Royal Naval War College and subsequently Chief of the Admiralty War Staff. He was advisor on overseas expeditions planning attacks on Germany's colonial possessions at the start of World War I and was selected as the surprise successor to Admiral Lord Fisher upon the latter's spectacular resignation in May 1915 following the failure of the Gallipoli Campaign. He had a cordial working relationship with First Lord of the Admiralty (and former Prime Minister) Arthur Balfour, but largely concerned himself with administrative matters and his prestige suffered when German destroyers appeared in the Channel, as a result of which he was replaced in December 1916. ==Early career== Born the son of Henry Jackson (linen manufacturer and bleacher) and Jane Jackson (née Tee) of Barnsley was educated in Chester and then at Stubbington House School near Fareham in Hampshire,〔''The Times''. 16 December 1929. p. 16.〕 Henry Bradwardine Jackson joined the Royal Navy as a cadet in the training ship HMS ''Britannia'' in 1868.〔Heathcote, p. 126〕 He was made a midshipman in the armoured frigate HMS ''Hector'' in the Reserve Fleet in April 1870 before transferring to the corvette HMS ''Cadmus'' in December 1871.〔 Promoted to sub-lieutenant on 18 October 1874, he was posted to the corvette HMS ''Rover'' on the North America and West Indies Station in August 1876.〔 Promoted to again to lieutenant on 27 October 1877, he joined the corvette HMS ''Active'' on the Cape of Good Hope Station in March 1878 and saw action ashore during the Anglo-Zulu War in 1879.〔 He attended the torpedo school HMS ''Vernon'' in 1881 and, after qualifying as a torpedo officer, joined the directing staff there.〔 Promoted to commander on 1 January 1890, Jackson became commanding officer of the torpedo school training ship HMS ''Defiance'' at Wearde Quay near Saltash in January 1895: at the school he established an early reputation as a pioneer of ship-to-ship wireless technology.〔(【引用サイトリンク】title=Captain Henry Jackson's Radio Experiments )〕 Promoted to captain on 30 June 1896, he became the first person to achieve ship-to-ship wireless communications and demonstrated continuous communication with another vessel up to three miles away.〔 He became naval attaché in Paris in 1897 and went on to be commanding officer of the cruiser HMS ''Juno'' (equipped with wireless) in July 1899 and commanding officer of the torpedo depot ship HMS ''Vulcan'' (also equipped with wireless) in the Mediterranean Fleet in December 1899.〔 He worked with Marconi to develop a fleet wireless system and this achievement was recognised with his election as a Fellow of the Royal Society in 1901.〔 He went on to be Assistant Director of Naval Ordnance at the Admiralty in February 1902, Commanding Officer of the battleship HMS ''Duncan'' in October 1903 and Captain of the torpedo school HMS ''Vernon'' in September 1904.〔 Jackson went on to be Third Sea Lord and Controller of the Navy in February 1905 and, having been appointed a Naval Aide-de-Camp to the King on 12 September 1905, he was promoted to rear-admiral on 18 October 1906. Appointed a Knight Commander of the Royal Victorian Order on 9 November 1906, he became Commander of the 6th Cruiser Squadron in the Mediterranean Fleet, hoisting his flag in the armoured cruiser HMS ''Bacchante'', in October 1908.〔Heathcote, p. 127〕 He was awarded the Grand Cross of the Spanish Order of Naval Merit on the occasion of the visit of his flagship to Valencia in May 1909. Jackson was promoted to vice-admiral on 15 March 1911 on appointment as Director of the Royal Naval War College.〔 He became Chief of the Admiralty War Staff in February 1913, and having been promoted to full admiral on 10 February 1914, he became advisor on overseas expeditions, planning attacks on Germany's colonial possessions at the start of World War I.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Henry Jackson (Royal Navy officer)」の詳細全文を読む スポンサード リンク
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