| | | | |
| Sidney Colpoys Dacres R.N. | Explanation |
| Son of Vice-admiral Sir Richard Dacres (1761-1837) |
| |
| Date (from) | (Date to) | Personal |
| 1805 | | Born. |
| October 1840 | | Married Emma Lambert |
| 1854 | | C.B. (Companion of the Bath). |
| 28 March 1865 | | K.C.B. (Knight Commander of the Bath). |
| 20 May 1871 | | G.C.B. (Knight Grand Cross of the Bath) |
| 8 March 1884 | | Died. |
| Literature: (DNB). |
| |
| Date | Rank |
| 1817 | Entered Navy |
| 5 May 1827 | Lieutenant |
| 28 August 1834 | Commander |
| 1 August 1840 | Captain |
| 25 June 1858 | Rear-Admiral |
| 17 November 1865 | Vice-Admiral |
| 1 April 1870 | Admiral |
| 1875 | Retired Admiral |
| |
| Date from | Date to | Service |
| 16 August 1836 | 15 September 1840 | Commander in Salamander, particular service |
| 16 November 1847 | | Captain in St Vincent, flagship of Rear-Admiral Charles Napier, Western squadron |
| 28 September 1849 | 3 June 1852 | Captain in Leander (from commissioning at Portsmouth), particular service (Squadron of Evolution) |
| 8 June 1852 | 22 November 1854 | Captain in Sans Pareil (from commissioning at Plymouth), Lisbon, then (1853) Channel squadron, then (1854) Black Sea during the Russian War |
| July 1855 | 25 June 1858 | Captain-Superintendent of Haslar Hospital and the Royal Clarence (Gosport) Victualling Yard. |
| 12 September 1859 | | Captain of the fleet to Vice-Admiral Arthur Fanshawe then Vice-Admiral William Fanshawe Martin, commander-in-chief, Mediterranean (flag in Marlborough) |
| 16 December 1861 | | Second in command in the Mediterranean (flag in Edgar) |
| 24 April 1863 | June 1866 | Commander-in-chief, Channel squadron |
| 12 July 1866 | 27 November 1872 | Commissioner of the Admiralty (2nd Naval Lord, then First Naval Lord from 18 Dec 1868) |
| 1872 | | Visitor and Governor of Greenwich Hospital |