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{{CaptRN}} '''Tristan Dannreuther''' (9 September, 1872 &ndash; 10 May, 1963) was an officer of the [[Royal Navy]].  His younger brother was [[Hubert Edward Dannreuther]], senior surviving officer of the destruction of the {{UK-Invincible|f=tp}}.

==Life & Career==
Tristan Dannreuther was born in Holland Park on 9 September, 1872, the eldest son of Edward Dannreuther, a Professor of Music, and Chariclea Anthea Euterpe Ionides.  Dannreuther entered the training ship [[H.M.S. Britannia (Training Ship)|''Britannia'']] at Dartmouth as a {{NavCadRN}} on 15 July, 1885.  He left after the customary two years' instruction in July, 1887.  He was appointed to {{UK-Garnet|f=t}} on the [[East Indies Station]] on 23 August.  He was rated {{MidRN}} on 15 November, having passed with a second class certificate in the examination for that rank.  ''Garnet'' paid off on 31 October, 1890, and he was appointed to the ''Duke of Wellington'' at Portsmouth on full pay leave.  On 27 January, 1891, he was appointed to the {{UK-1Inflexible|f=t}} on the [[Mediterranean Station]].  He obtained a second class certificate in seamanship on 14 November, and was promoted to the rank of Acting {{SubRN}} on that date.  He returned to Britain and on 11 January, 1892, started study at the [[Royal Naval College, Greenwich]] for the examinations for the rank of {{LieutRN}}.  He was lent to the cruiser {{UK-Iris}} from 21 July to 20 August for the annual man&oelig;uvres.

At the College he obtained a second class in College, Part I, a first in Torpedo, a second in gunnery, and a second in pilotage.  On 1 March, 1893 he was appointed to the ''Neptune'' for the {{UK-2Foxhound}}, for navigating duties, and was reappointed on his promotion to Lieutenant on 31 December.  On 1 September, 1894, he was appointed to the {{UK-Melita}} in the Mediterranean for navigating duties.  He was superseded in January, 1897, and in March applied for a compass course at the Royal Naval College, and on 30 March passed in pilotage for first class ships with a first class certificate.  He was appointed navigating officer of the {{UK-1Leander}} on the [[Pacific Station (Royal Navy)|Pacific Station]] on 8 June.  She was paid off on 15 January, 1901.

During the customary foreign service full pay leave Dannreuther went on a 3 week voluntary course at the National Physical Laboratory and obtained a diploma from the Geographical Society for practical astronomy and land surveying.  He was appointed to the ''Ariadne'' in Home waters on 25 April, 1901, for navigating duties, and on 15 November was appointed navigating officer of the {{UK-1Hood}} in the Mediterranean.  He remained in her until 14 June, 1902, when he was invalided with Mediterranean Fever.

From 24 October, 1902, to 1 June, 1903, Dannreuther underwent a war course at the Royal Naval College at Greenwich, and was asked to remain briefly to assist the Captain of the College, [[Henry John May|Henry J. May]], in setting up a course for flag officers.  On 6 June he was appointed to the {{UK-Leviathan}} for navigating duties, and from 16 June as First Lieutenant and Navigating Officer.  He incurred Their Lordships' "severe displeasure for gross neglect of duty" for grounding ''Leviathan''.  He was to be superseded in his appointment as a result when the ship relieved {{UK-Bacchante}}.<ref>Dannreuther Service Record.  {{TNA|ADM 196/43/245.|D7602578}} f. 270.</ref>

This relief may have occurred on 25 January, 1905, as Dannreuther was appointed as navigating officer in the {{UK-Bacchante}}, which paid off on 22 February and reduced to nucleus crew on the following day.  She paid off again on 14 August. On 5 September he was appointed navigating officer of the {{UK-Roxburgh}}, until superseded on 12 December.

==Commander==
Dannreuther was promoted to the rank of {{CommRN}} on 31 December, 1905.  On 12 February, 1906, he was appointed to the {{UK-1Vindictive}}, where he remained until 6 November, when he was appointed to the {{UK-Aboukir}}, from which he was appointed to the ''Leviathan'', where he stayed until 2 April, 1907, on which date he was appointed to the {{UK-Amphitrite}}.  On 12 November he was appointed to the {{UK-Kent}} on the [[China Station]].  ''Kent'' paid off on 13 December, 1909.

After the usual full paid leave he went on a gunnery course from 28 February to 25 March, 1910, and on 2 August was appointed to {{UK-Albion}} for {{UK-Canopus}}.  On 17 January, 1911, he was appointed to the {{UK-1Intrepid}}, in which he served as second-in-command for two years, being superseded on 17 January, 1913.  From 3 March to June he underwent a course at the [[Royal Naval War College]], obtaining a first class, and on 1 October was appointed to the Army Staff College at Camberley, where he remained until his appointment, on 9 February, 1914, to {{UK-Majestic}} for {{UK-Mars}} in the Third Fleet at Devonport.

==Great War==
''Mars'' paid off on 20 February, 1915.  On 4 May Dannreuther appointed to the armed merchant cruiser {{UK-KinfaunsCastle}}.  He was given the command of the armed merchant cruiser {{UK-Patuca}} on 19 August of that year, and the rank of Acting {{CaptRN}} on 26 September, 1916.  He was promoted to the rank of Captain on 30 June, 1918.  During his command of ''Patuca'' the ship had served with the {{UK-CS|10}} on the Northern Patrol and the {{UK-CS|9}} in the Mid-Atlantic.

==Post-War==
He was appointed an [[Naval Intelligence Division (Royal Navy)|Assistant Director of Naval Intelligence]] on 7 April, 1919, being succeeded by Captain [[Edward Owen Cochrane|Edward O. Cochrane]] on 15 July, 1921.  He was placed on the Retired List, at his own request, on 9 September, 1922, under the terms of A.F.O. 1358/23.  He had been informed by the [[Naval Secretary to the First Lord of the Admiralty|Naval Secretary]] that he was going to be retired whatever happened.

He died at St. Leonards-on-Sea on 10 May, 1963, aged 90.

==Bibliography==
{{refbegin}}
*Dannreuther, Tristan (February, 1931).  “Slave Cruising Off Zanzibar and Pemba, 1887–1890—1892”.  ''The Naval Review''.  Vol. XIX.  No. 1. 45-68.
*Dannreuther, Tristan (February, 1939).  “Yarns about Stores”.  ''The Naval Review''.  Vol. XXVII.  No. 1.  62-73.
*Dannreuther, Tristan (October, 1961).  “Musings of an Octogenarian”.  ''The Naval Review''.  Vol. XLIX.  No. 4.  379-382.
*Dannreuther, Tristan (January, 1962).  “Musings of an Octogenarian-II”.  ''The Naval Review''.  Vol. L   No. 1.  82-91.
{{refend}}

==Papers==
{{refbegin}}
*[[Tristan Dannreuther Papers at the National Maritime Museum|Dannreuther papers in the possession of the National Maritime Museum]].
{{refend}}

==Service Records==
{{refbegin}}
*{{TNA|ADM 196/141.|D8120653}}
*{{TNA|ADM 196/90.|D8115893}}
*{{TNA|ADM 196/43.|D7602578}}
{{refend}}


<div name=fredbot:appts>{{TabApptsBegin}}
{{TabNaval}}
{{TabApptsRow|Preceded by<br>'''[[Francis Gerald St. John|Francis G. St. John]]'''|'''[[H.M.S. Canopus (1897)|Captain of H.M.S. ''Canopus'']]'''<br>2 Aug, 1910{{NMI|Friday, 8 July, 1910.  Issue '''39319''', col F, p. 9}} &ndash; 17 Jan, 1911<ref>Dannreuther Service Record.  {{TNA|ADM 196/43/245.|D7602578}} f. 270.</ref>|Succeeded by<br>'''[[James William Guy Innes|James W. G. Innes]]'''}}
{{TabApptsRow|Preceded by<br>'''[[Norman Litchfield Stanley|Norman L. Stanley]]'''|'''[[H.M.S. Intrepid (1891)|Captain of H.M.S. ''Intrepid'']]'''<br>17 Jan, 1911{{NLAug12|p. 333}}|Succeeded by<br>'''[[Harry Hesketh Smyth|Harry H. Smyth]]'''}}
{{TabApptsRow|Preceded by<br>'''[[Henry Willcox Osburn|Henry W. Osburn]]'''|'''[[H.M.S. Mars (1896)|Captain of H.M.S. ''Mars'']]'''<br>9 Feb, 1914<ref>Dannreuther Service Record.  {{TNA|ADM 196/43/245.|D7602578}} f. 270.</ref>{{NLJul14|p. 345}} &ndash; 20 Feb, 1915<ref>Dannreuther Service Record.  {{TNA|ADM 196/43/245.|D7602578}} f. 270.</ref>|Succeeded by<br>'''[[Richard Morden Harbord-Hamond, Tenth Baron Suffield|Richard M. Harbord]]'''}}
{{TabApptsRow|Preceded by<br>'''[[Denis Burke Crampton|Denis B. Crampton]]'''|'''[[H.M.S. Kinfauns Castle (1899)|Captain of H.M.S. ''Kinfauns Castle'']]'''<br>4 May, 1915 &ndash; 19 Aug, 1915|Succeeded by<br>'''[[Maurice Dorsett Evans|Maurice D. Evans]]'''}}
{{TabApptsRow|Preceded by<br>'''[[Percy George Brown|Percy G. Brown]]'''|'''[[H.M.S. Patuca (1913)|Captain of H.M.S. ''Patuca'']]'''<br>19 Aug, 1915{{NLDec16|p. 401''w''}} &ndash; 30 Jun, 1918<ref>Dannreuther Service Record.  {{TNA|ADM 196/43/245.|D7602578}} f. 270.</ref>|Succeeded by<br>'''?'''}}
{{TabEnd}}
</div name=fredbot:appts>

==Footnotes==
{{reflist}}

{{DEFAULTSORT:Dannreuther, Tristan}}

{{CatPerson|UK|1872|1963}}
{{CatNavigatingOfficer|UK}}
{{CatCapt|UK}}
{{CatBritannia|July, 1885}}
{{CatRN}}