| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | Generalinspekteur der Marine - List of Generalinspekteur der Marine |  |  |  |  |  |
| 3 | № | - | Inspector General | Took office | Left office | Time in office |
| 4 | 1 | Prinz Adalbert of Prussia | Admiral Prinz Adalbert of Prussia (1811–1873) | 1871 | 6 June 1873 † | 1–2 years |
| 5 | 2 | Hans von Koester | Admiral Hans von Koester (1844–1928) | 14 March 1899 | 29 December 1906 | 7 years, 290 days |
| 6 | 3 | Prinz Heinrich of Prussia | Admiral Prinz Heinrich of Prussia (1862–1929) | 1 October 1909 | 10 August 1918 | 8 years, 313 days |

Question: When did Admiral Hans von Koester hold the office?
Answer: Admiral Hans von Koester held the office of Generalinspekteur der Marine from 14 March 1899 until 29 December 1906.